{"id":6455,"date":"2025-12-24T17:21:06","date_gmt":"2025-12-24T08:21:06","guid":{"rendered":"https:\/\/math-travel.com\/?p=6455"},"modified":"2026-02-11T17:21:11","modified_gmt":"2026-02-11T08:21:11","slug":"shisuu-log","status":"publish","type":"post","link":"https:\/\/math-travel.jp\/math-2\/shisuu-log\/","title":{"rendered":"\u3010\u6307\u6570\u30fb\u5bfe\u6570\u95a2\u6570\u3011log\u306e\u516c\u5f0f\u30fb\u6027\u8cea\u3092\u7dcf\u307e\u3068\u3081\uff01\u8a08\u7b97\u3092\u5b8c\u74a7\u306b\u3059\u308b\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"\n<p><span class=\"huto\">\u300c\u6307\u6570\u95a2\u6570\u30fb\u5bfe\u6570\u95a2\u6570\u304c\u82e6\u624b\u300d<\/span><br><span class=\"huto\">\u300c\u6307\u6570\u30fb\u5bfe\u6570\u306e\u7dcf\u5fa9\u7fd2\u304c\u3057\u305f\u3044\u300d<\/span><br>\u4eca\u56de\u306f\u6307\u6570\u95a2\u6570\u3068\u5bfe\u6570\u95a2\u6570\u306b\u95a2\u3059\u308b\u3053\u3093\u306a\u60a9\u307f\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi5-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u30c6\u30b9\u30c8\u306b\u5411\u3051\u3066\u6307\u6570\u30fb\u5bfe\u6570\u306e\u5fa9\u7fd2\u304c\u3057\u305f\u3044\u3067\u3059\u2026<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f<span class=\"hutoaka\">\u6307\u6570\u30fb\u5bfe\u6570\u95a2\u6570\u306b\u3064\u3044\u3066\u5fb9\u5e95\u89e3\u8aac<\/span>\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305c\u3072\u5b9a\u671f\u30c6\u30b9\u30c8\u306b\u5411\u3051\u305f\u7dcf\u5fa9\u7fd2\u306b\u6d3b\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sisuu\">\u6307\u6570\u95a2\u6570<\/h2>\n\n\n\n<p><span class=\"huto\">\u6307\u6570\u95a2\u6570\u3068\u306f\u3001\\(a&gt;0,a\u22601\\)\u3068\u3057\u3066\\(y=a^{x}\\)\u306e\u3088\u3046\u306b\u6307\u6570\u306b\u5909\u6570\u3092\u542b\u3080\u95a2\u6570\u3067\u3059\u3002<\/span><\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6307\u6570\u95a2\u6570<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,a\u22601\\)\u306e\u3068\u304d<\/p>\n\n\n\n<p>\\[y=a^{x}\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\\(y=a^{x}\\)\u306b\u304a\u3044\u3066\u3001\\(a\\)\u306e\u3053\u3068\u3092<span class=\"hutoaka\">\u5e95\uff08\u3066\u3044<\/span>\uff09\u3068\u3044\u3044\u3001\\(x\\)\u306e\u3053\u3068\u3092<span class=\"hutoaka\">\u6307\u6570\uff08\u3057\u3059\u3046\uff09<\/span>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"297\" height=\"122\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5e95\u3068\u6307\u6570.png\" alt=\"\u5e95\u3068\u771f\u6570\u304c\u8868\u3059\u3082\u306e\" class=\"wp-image-6572\"\/><\/figure>\n<\/div>\n\n\n<p>\u3064\u307e\u308a\u3001\\(y=a^{x}\\)\u306f\u300c\u5e95\u304c\\(a\\),\u6307\u6570\\(x\\)\u306e\u6307\u6570\u95a2\u6570\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f\u3069\u3093\u306a\u5f62\uff1f<\/h3>\n\n\n\n<p>\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3092\u30a4\u30e1\u30fc\u30b8\u3067\u304d\u307e\u3059\u304b\uff1f<\/p>\n\n\n\n<p>\u5e95\u306e\u5024\u306b\u3088\u3063\u3066\u3001\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f\u5909\u5316\u3059\u308b\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>[1] \\(a&gt;1\\)\u306e\u3068\u304d<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"395\" height=\"288\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5.png\" alt=\"\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\" class=\"wp-image-6487\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5.png 395w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5-300x219.png 300w\" sizes=\"(max-width: 395px) 100vw, 395px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>a&gt;1\u306e\u3068\u304d<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\u70b9\\((0,1)\\)\u3092\u901a\u308b<\/li>\n\n\n\n<li>\\(x\\)\u304c\u5927\u304d\u304f\u306a\u308b\u307b\u3069\u5897\u52a0<\/li>\n\n\n\n<li>\\(x\\)\u304c\u5c0f\u3055\u304f\u306a\u308b\u307b\u30690\u306b\u8fd1\u3065\u304f<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>[2] \\(a&lt;1\\)\u306e\u3068\u304d<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"405\" height=\"301\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/ya^-x\u306e\u30b0\u30e9\u30d5\u2460.png\" alt=\"\u6307\u6570\u306e\u5e95\u304c1\u3088\u308a\u5c0f\u3055\u3044\u3068\u304d\" class=\"wp-image-6505\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/ya^-x\u306e\u30b0\u30e9\u30d5\u2460.png 405w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/ya^-x\u306e\u30b0\u30e9\u30d5\u2460-300x223.png 300w\" sizes=\"(max-width: 405px) 100vw, 405px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>a&lt;1\u306e\u3068\u304d<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\u70b9\\((0,1)\\)\u3092\u901a\u308b<\/li>\n\n\n\n<li>\\(x\\)\u304c\u5927\u304d\u304f\u306a\u308b\u307b\u30690\u306b\u8fd1\u3065\u304f<\/li>\n\n\n\n<li>\\(x\\)\u304c\u5c0f\u3055\u304f\u306a\u308b\u307b\u3069\u5897\u52a0<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u6307\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u66f8\u304d\u65b9\u306f\u3053\u3061\u3089\u3067\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u21d2\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3068\u66f8\u304d\u65b93\u30b9\u30c6\u30c3\u30d7\u3092\u89e3\u8aac\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6307\u6570\u306e\u8a08\u7b97\u516c\u5f0f<\/h3>\n\n\n\n<p>\u6307\u6570\u95a2\u6570\u3092\u4f7f\u3044\u3053\u306a\u3059\u306b\u306f<span class=\"hutoaka\">\u6307\u6570\u6cd5\u5247<\/span>\u306e\u7406\u89e3\u3082\u6b20\u304b\u305b\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p><span class=\"huto\">\u4ee5\u4e0b\u304c\u6307\u6570\u6cd5\u5247\u306e\u91cd\u8981\u306a\u516c\u5f0f\u3067\u3059\u3002<\/span><\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6307\u6570\u6cd5\u5247\u306e\u57fa\u672c\u516c\u5f0f<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\\(a\u22600,b\u22600\\)\u3067\u3001\\(m,n\\)\u304c\u6574\u6570\u306e\u3068\u304d<\/li>\n\n\n\n<li>\\(a^{m} \\times a^{n}=a^{m+n}\\)<\/li>\n\n\n\n<li>\\((a^{m})^{n}=a^{mn}\\)<\/li>\n\n\n\n<li>\\((ab)^{n}=a^{n}b^{n}\\)<\/li>\n\n\n\n<li>\\(a^{m} \\div a^{n}=a^{m-n}\\)<\/li>\n\n\n\n<li>\\(\\displaystyle \\left(\\frac{a}{b} \\right)^{n}=\\frac{a^{n}}{b^{n}}\\)<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u4ee5\u4e0b\u306e3\u3064\u306e\u516c\u5f0f\u3082\u304b\u306a\u308a\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6307\u6570\u6cd5\u5247\u306e\u91cd\u8981\u516c\u5f0f<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a\u22600,b\u22600\\)\u3067\u3001\\(m,n\\)\u304c\u6574\u6570\u306e\u3068\u304d<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\\(a^{0}=1\\)<\/li>\n\n\n\n<li>\\(\\displaystyle a^{-n}=\\frac{1}{a^{n}}\\)<\/li>\n\n\n\n<li>\\(\\displaystyle a^{\\frac{1}{n}}=\\sqrt[n]{a}\\)<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u3053\u3053\u3067\u306f\u516c\u5f0f\u306e\u7d39\u4ecb\u3057\u304b\u3057\u307e\u305b\u3093\u304c\u3001\u8a73\u3057\u3044\u4f7f\u3044\u65b9\u3084\u7df4\u7fd2\u554f\u984c\u306f\u300c\u6307\u6570\u6cd5\u5247\u306e\u91cd\u8981\u306a\u516c\u5f0f8\u9078\uff01\u3053\u308c\u3067\u5206\u6570\u3084\u30de\u30a4\u30ca\u30b9\u306b\u3082\u56f0\u3089\u306a\u3044\uff01\u300d\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6307\u6570\u65b9\u7a0b\u5f0f<\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u6307\u6570\u95a2\u6570\u3092\u542b\u3080\u65b9\u7a0b\u5f0f\u3092<span class=\"hutoaka\">\u6307\u6570\u65b9\u7a0b\u5f0f<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6307\u6570\u65b9\u7a0b\u5f0f\u306e\u4f8b<\/span><\/div><div class=\"cap_box_content\">\n<p>\\[2^{x}=8\\]<\/p>\n\n\n\n<p>\\[9^{x}+3^{x}=90\\]<\/p>\n\n\n\n<p>\\[2^{2x}-6 \\cdot 2^{x} +8=0\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u3068\u3044\u3046\u306e\u306f\u3001\u4e0e\u3048\u3089\u308c\u305f\u7b49\u5f0f\u3092\u6210\u308a\u7acb\u305f\u305b\u308b\\(x\\)\u306e\u5024\u3092\u6c42\u3081\u308b\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6307\u6570\u65b9\u7a0b\u5f0f\u306e\u89e3\u304d\u65b9\u306b\u306f\u5927\u304d\u304f5\u3064\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6307\u6570\u65b9\u7a0b\u5f0f\u306e5\u30d1\u30bf\u30fc\u30f3<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\u5e95\u3092\u305d\u308d\u3048\u308b\u554f\u984c<\/li>\n\n\n\n<li>\u30eb\u30fc\u30c8\u3084\u5206\u6570\u304c\u3042\u308b\u554f\u984c<\/li>\n\n\n\n<li>\u7f6e\u304d\u63db\u3048\u308b\u554f\u984c<\/li>\n\n\n\n<li>\u5bfe\u6570\u3067\u7b54\u3048\u308b\u554f\u984c<\/li>\n\n\n\n<li>\u9023\u7acb\u65b9\u7a0b\u5f0f\u306e\u554f\u984c<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u305d\u308c\u305e\u308c\u306e\u89e3\u304d\u65b9\u306f\u300c\u6307\u6570\u65b9\u7a0b\u5f0f\u306e\u89e3\u304d\u65b9\uff01\u51685\u30d1\u30bf\u30fc\u30f3\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\uff01\u300d\u306b\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6307\u6570\u4e0d\u7b49\u5f0f<\/h3>\n\n\n\n<p>\u6307\u6570\u65b9\u7a0b\u5f0f\u306e\u6b21\u306f\u6307\u6570\u4e0d\u7b49\u5f0f\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u6307\u6570\u306b\u5909\u6570\\(x\\)\u3092\u542b\u3080\u4e0d\u7b49\u5f0f\u3092<span class=\"hutoaka\">\u6307\u6570\u4e0d\u7b49\u5f0f<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\begin{eqnarray}<br>2^{x}&amp;\u2267&amp;8\\\\<br>\\displaystyle \\left(\\frac{1}{3}\\right)^{x+1}&amp;&lt;&amp;\\left(\\frac{1}{9}\\right)^{x}<br>\\end{eqnarray}<\/p>\n<\/div><\/div>\n\n\n\n<p>\u6307\u6570\u4e0d\u7b49\u5f0f\u3092\u89e3\u304f\u3068\u304d\u306b\u306f<span class=\"hutoaka\">\u5e95\\(a\\)\u306e\u5024\u306b\u6ce8\u610f<\/span>\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6ce8\u610f\u30dd\u30a4\u30f3\u30c8<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,a\u22601\\)\u306b\u304a\u3044\u3066<\/p>\n\n\n\n<p>\\(a&gt;1\\)\u306e\u3068\u304d\u3001\\(y=a^{x}\\)\u306f\u5897\u52a0\u95a2\u6570\u306a\u306e\u3067<\/p>\n\n\n\n<p>\\[a^{m}&lt;a^{n} \\Leftrightarrow m&lt;n\\]<\/p>\n\n\n\n<p>\\(0&lt;a&lt;1\\)\u306e\u3068\u304d\u3001\\(y=a^{x}\\)\u306f\u6e1b\u5c11\u95a2\u6570\u306a\u306e\u3067<\/p>\n\n\n\n<p>\\[a^{m}&lt;a^{n} \\Leftrightarrow m&gt;n\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u6307\u6570\u4e0d\u7b49\u5f0f\u306b\u3082\u89e3\u304d\u65b9\u304c\u3042\u308a\u3001\u300c\u6307\u6570\u4e0d\u7b49\u5f0f\u306e\u89e3\u304d\u65b9\u3068\u6ce8\u610f\u70b9\uff01log\u3084\u7f6e\u304d\u63db\u3048\u554f\u984c\u3082\u89e3\u8aac\uff01\u300d\u306b\u3066\u89e3\u304d\u65b9\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6307\u6570\u4e0d\u7b49\u5f0f\u306e\u30d1\u30bf\u30fc\u30f3<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\u5e95\u304c1\u3088\u308a\u5927\u304d\u3044\u3068\u304d<\/li>\n\n\n\n<li>\u5e95\u304c1\u3088\u308a\u5c0f\u3055\u3044\u3068\u304d<\/li>\n\n\n\n<li>\u7f6e\u304d\u63db\u3048\u308b\u554f\u984c<\/li>\n\n\n\n<li>\u5bfe\u6570\u3092\u3068\u308b\u554f\u984c<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"taisuu\">\u5bfe\u6570\u95a2\u6570<\/h2>\n\n\n\n<p>\\(y=log_{a}x\\)\u306e\u3088\u3046\u306a\u95a2\u6570\u3092\u3001\\(a\\)\u3092\u5e95\u3068\u3059\u308b\\(x\\)\u306e<span class=\"hutoaka\">\u5bfe\u6570\u95a2\u6570<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570\u95a2\u6570<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,a\u22601,x&gt;0\\)\u3068\u3059\u308b\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u95a2\u6570\u3092\u5bfe\u6570\u95a2\u6570\u3068\u3044\u3046\u3002<\/p>\n\n\n\n<p>\\[y=log_{a}x\\]<\/p>\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u5bfe\u6570log\u3068\u306f\uff1f<\/h3>\n\n\n\n<p>\u5bfe\u6570\\(log_{a}M\\)\u3068\u306f\u3001\u300c\\(M\\)\u306f\\(a\\)\u306e\u4f55\u4e57\u306a\u306e\u304b\u300d\u3092\u8868\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,a\u22601\\)\u3067\\(M&gt;0\\)\u306b\u304a\u3044\u3066\u3001<\/p>\n\n\n\n<p>\\[log_{a}M=x \\Leftrightarrow a^{x}=M\\]<\/p>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u771f\u6570\\(b\\)\u306f\u6b63\u306e\u6570\u3067\u3042\u308b\u3002<\/p>\n<\/div><\/div>\n\n\n\n<p>\\[a^{x}=M\\]<\/p>\n\n\n\n<p>\\(a\\)\u306e\\(x\\)\u4e57\u304c\\(M\\)\u306e\u3068\u304d\u3001\u5bfe\u6570\u3067\u8868\u3059\u3053\u3068\u3067<\/p>\n\n\n\n<p>\\[log_{a}M=x\\]<\/p>\n\n\n\n<p>\u3068\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi1-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30b7\u30fc\u30bf<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u6307\u6570\u3068\u5bfe\u6570\u306f\u5408\u308f\u305b\u3066\u7406\u89e3\u3057\u3066\u3044\u3053\u3046<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\\(log_{a}b=x\\)\u306b\u304a\u3051\u308b\\(a\\)\u3092\u5e95\uff08\u3066\u3044\uff09\u3001\\(b\\)\u3092\u771f\u6570\uff08\u3057\u3093\u3059\u3046\uff09\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5e95\u3068\u771f\u6570.png\" alt=\"\u5e95\u3068\u771f\u6570\u304c\u8868\u3059\u3082\u306e\" class=\"wp-image-6573\"\/><\/figure>\n<\/div>\n\n\n<p>\u5e95\u306f\u6307\u6570\u3067\u8868\u3059\u3068\u304d\u306b\u3082\u4f7f\u3046\u7528\u8a9e\u306a\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u6307\u6570\\(a^{x}=b\\)\u306b\u304a\u3051\u308b\\(a\\)\u3092\u5e95\u3001\\(x\\)\u3092\u6307\u6570\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5bfe\u6570\u306e\u6027\u8cea<\/h3>\n\n\n\n<p>\u6307\u6570\u306b\u6307\u6570\u6cd5\u5247\u304c\u3042\u308b\u3088\u3046\u306b\u3001\u5bfe\u6570\u306b\u3082\u3044\u304f\u3064\u304b\u91cd\u8981\u306a\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570\u306e\u6027\u8cea<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,m&gt;0,n&gt;0,a\u22601\\)\u306b\u304a\u3044\u3066<\/p>\n\n\n\n<p>\\(log_{a}a=1\\)<\/p>\n\n\n\n<p>\\(log_{a}a^{m}=m\\)<\/p>\n\n\n\n<p>\\(log_{a}b^{m}=m log_{a}b\\)<\/p>\n\n\n\n<p>\\(log_{a}m+log_{a}n=log_{a}mn\\)<\/p>\n\n\n\n<p>\\(\\displaystyle log_{a}m-log_{a}n=log_{a} \\frac{m}{n}\\)<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6027\u8cea\u306f\u5bfe\u6570\u306e\u8a08\u7b97\u3067\u5f53\u305f\u308a\u524d\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e95\u306e\u5909\u63db\u516c\u5f0f<\/h3>\n\n\n\n<p>\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306f<span class=\"hutoaka\">\u5bfe\u6570log\u306e\u91cd\u8981\u306a\u516c\u5f0f\u306e1\u3064<\/span>\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5e95\u306e\u5909\u63db\u516c\u5f0f<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a,b,c&gt;0\u3001a,c\u22601\\)\u306e\u3068\u304d<\/p>\n\n\n\n<p>\\[\\displaystyle log_{a}b=\\frac{log_{c}b}{log_{c}a}\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5bfe\u6570\u306e\u8a08\u7b97\u304c\u3042\u3063\u305f\u3068\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\u6b21\u306e\u8a08\u7b97\u3092\u6c42\u3081\u3088\u3046\u3002<\/p>\n\n\n\n<p>\\[\\displaystyle log_{2}3 \\cdot log_{3}4\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306f\u5bfe\u6570\u306e\u5e95\u304c\u7570\u306a\u308b\u306e\u3067\u3001\u3053\u306e\u307e\u307e\u3067\u306f\u7a4d\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u305d\u3053\u3067\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306e\u51fa\u756a\u3067\u3059\u3002<\/p>\n\n\n\n<p>\\[\\displaystyle log_{3}4=\\frac{log_{2}4}{log_{2}3}=\\frac{2}{log_{2}3}\\]<\/p>\n\n\n\n<p>\u5e95\u306e\u5909\u63db\u516c\u5f0f\u3092\u4f7f\u3048\u3070\u3001\u5e95\u3092\u8a08\u7b97\u306e\u90fd\u5408\u304c\u3088\u3044\u5024\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u554f\u984c\u3067\u306f\u3001\u5bfe\u6570\u306e\u5e95\u30922\u306b\u5909\u63db\u3057\u3066\u7a4d\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\\begin{eqnarray}<br>\\displaystyle log_{2}3 \\cdot log_{3}4&amp;=&amp;log_{2}3 \\cdot \\frac{2}{log_{2}3}\\\\<br>&amp;=&amp;2<br>\\end{eqnarray}<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u5e95\u306e\u5909\u63db\u516c\u5f0f\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001\u5bfe\u6570\u306e\u8a08\u7b97\u304c\u30b9\u30e0\u30fc\u30ba\u306b\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><span class=\"yellow-hoso\">\u975e\u5e38\u306b\u91cd\u8981\u306a\u516c\u5f0f\u306a\u306e\u3067\u5fc5\u305a\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"620\" height=\"251\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306e\u899a\u3048\u65b9.png\" alt=\"\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306e\u899a\u3048\u65b9\" class=\"wp-image-6595\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306e\u899a\u3048\u65b9.png 620w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306e\u899a\u3048\u65b9-300x121.png 300w\" sizes=\"(max-width: 620px) 100vw, 620px\" \/><\/figure>\n<\/div>\n\n\n<p>\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306b\u3064\u3044\u3066\u306f\u3001\u300c\u5e95\u306e\u5909\u63db\u516c\u5f0f\u306b\u3064\u3044\u3066\u89e3\u8aac\uff01\u8a3c\u660e\u3068\u5e95\u3092\u6c7a\u3081\u308b\u30b3\u30c4\u304c\u5206\u304b\u308b\uff01\u300d\u306b\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5<\/h3>\n\n\n\n<p>\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u5f62\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u5bfe\u6570\u95a2\u6570\u3092\u30b0\u30e9\u30d5\u3067\u8868\u3059\u3068\u304d\u306f\u3001<span class=\"hutoaka\">\u5e95\u306e\u5024\u306b\u6ce8\u610f<\/span>\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><span class=\"checkmark2 on-color\"><span class=\"huto\">\\(a&gt;1\\)\u306e\u3068\u304d\u306f\u3001\u53f3\u4e0a\u304c\u308a\u306e\u30b0\u30e9\u30d5\u306b\u306a\u308a\u307e\u3059\u3002<\/span><\/span><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"480\" height=\"289\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d51\u3088\u308a\u5927\u304d\u3044\u5834\u5408.png\" alt=\"\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u5f62\" class=\"wp-image-6616\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d51\u3088\u308a\u5927\u304d\u3044\u5834\u5408.png 480w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d51\u3088\u308a\u5927\u304d\u3044\u5834\u5408-300x181.png 300w\" sizes=\"(max-width: 480px) 100vw, 480px\" \/><\/figure>\n<\/div>\n\n\n<p><span class=\"checkmark2 on-color\"><span class=\"huto\">\\(0&lt;a&lt;1\\)\u306e\u3068\u304d\u306f\u3001\u53f3\u4e0b\u304c\u308a\u306e\u30b0\u30e9\u30d5\u306b\u306a\u308a\u307e\u3059\u3002<\/span><\/span><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"607\" height=\"367\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d51\u3088\u308a\u5c0f\u3055\u3044\u5834\u5408.png\" alt=\"\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u5f62\" class=\"wp-image-6615\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d51\u3088\u308a\u5c0f\u3055\u3044\u5834\u5408.png 607w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d51\u3088\u308a\u5c0f\u3055\u3044\u5834\u5408-300x181.png 300w\" sizes=\"(max-width: 607px) 100vw, 607px\" \/><\/figure>\n<\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi7-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u6ed1\u3089\u304b\u306a\u66f2\u7dda\u306b\u306a\u308b\u3093\u3067\u3059\u306d\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u7279\u5fb4\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u7279\u5fb4<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\u70b9(1,0)\u3092\u901a\u308b<\/li>\n\n\n\n<li>a&gt;1\u306e\u3068\u304d\u53f3\u4e0a\u304c\u308a\u3067\u3001\u70b9(a,1)\u3092\u901a\u308b<\/li>\n\n\n\n<li>0&lt;a&lt;1\u306e\u3068\u304d\u53f3\u4e0b\u304c\u308a\u3067\u3001\u70b9(\\(\\displaystyle \\frac{1}{a}\\),-1)\u3092\u901a\u308b<\/li>\n\n\n\n<li>y\u8ef8\u304c\u6f38\u8fd1\u7dda<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u30dd\u30a4\u30f3\u30c8\u3084\u66f8\u304d\u65b9\u306f\u300c\u5bfe\u6570\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3068\u66f8\u304d\u65b93\u30b9\u30c6\u30c3\u30d7\u3092\u89e3\u8aac\uff01\u300d\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5bfe\u6570\u95a2\u6570\u306e\u65b9\u7a0b\u5f0f<\/h3>\n\n\n\n<p>\u5bfe\u6570\u95a2\u6570\u3092\u542b\u3080\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u65b9\u7a0b\u5f0f\u3092<span class=\"hutoaka\">\u5bfe\u6570\u65b9\u7a0b\u5f0f<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\[log_{2}x=3\\]<\/p>\n\n\n\n<p>\\[log_{4}x+log_{4}(x-6)=2\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u306e\u65b9\u7a0b\u5f0f\u3092\u6210\u308a\u7acb\u305f\u305b\u308b\\(x\\)\u3092\u6c42\u3081\u308b\u306e\u304c\u3001\u5bfe\u6570\u65b9\u7a0b\u5f0f\u306e\u4e3b\u306a\u554f\u984c\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u65b9\u7a0b\u5f0f\u304c\u9577\u304f\u306a\u308b\u3068\u96e3\u3057\u304f\u898b\u3048\u307e\u3059\u306d\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi5-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u305d\u3046\u3067\u3059\u3002\u3053\u3046\u3044\u3046\u306e\u304c\u82e6\u624b\u306a\u3093\u3067\u3059..<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u5bfe\u6570\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u5f62\u3092\u76ee\u6307\u3057\u3066\u5f0f\u5909\u5f62\u3092\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570\u65b9\u7a0b\u5f0f\u306e\u89e3\u304d\u65b9<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,a\u22601\\)\u3067\u3001\\(M&gt;0,N&gt;0\\)\u306e\u3068\u304d<\/p>\n\n\n\n<p>\\[log_{a}M=log_{a}N\\]<\/p>\n\n\n\n<p>\u306a\u3089\u3070<\/p>\n\n\n\n<p>\\[M=N\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3064\u307e\u308a\u3001<\/p>\n\n\n\n<p>\\[log_{2}x=log_{2}5\u21d2x=5\\]<\/p>\n\n\n\n<p>\u3068\u3044\u3046\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3068\u306f\u3044\u3048\u3001\u3053\u3093\u306a\u7c21\u5358\u306a\u554f\u984c\u306f\u305d\u3046\u305d\u3046\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p><span class=\"huto\">\u3069\u3093\u306a\u5bfe\u6570\u65b9\u7a0b\u5f0f\u306e\u554f\u984c\u3067\u3082\u3001\u4ee5\u4e0b\u306e5\u30b9\u30c6\u30c3\u30d7\u3067\u89e3\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570\u65b9\u7a0b\u5f0f\u306e\u89e3\u304d\u65b9<\/span><\/div><div class=\"cap_box_content\">\n<ol class=\"wp-block-list\">\n<li>\u771f\u6570\u6761\u4ef6\u3068\u5e95\u306e\u6761\u4ef6\u3092\u78ba\u8a8d<\/li>\n\n\n\n<li>\u4e21\u8fba\u306e\u5e95\u3092\u540c\u3058\u306b\u3059\u308b<\/li>\n\n\n\n<li>\u771f\u6570\u3092\u30a4\u30b3\u30fc\u30eb\u3067\u3080\u3059\u3076<\/li>\n\n\n\n<li>\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f<\/li>\n\n\n\n<li>\u89e3\u3068\u6761\u4ef6\u3092\u78ba\u8a8d\u3057\u3066\u5b8c\u4e86<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>\u307e\u305f\u3001\u5bfe\u6570\u65b9\u7a0b\u5f0f\u306e\u554f\u984c\u306f\u4ee5\u4e0b\u306e4\u7a2e\u985e\u306b\u5206\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570\u65b9\u7a0b\u5f0f\u306e\u554f\u984c<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list\">\n<li>\u57fa\u672c\u306e\u554f\u984c<\/li>\n\n\n\n<li>\u5e95\u3092\u305d\u308d\u3048\u308b\u554f\u984c<\/li>\n\n\n\n<li>\u7f6e\u304d\u63db\u3048\u308b\u554f\u984c<\/li>\n\n\n\n<li>\u5e95\u306b\u6587\u5b57\u3092\u542b\u3080\u554f\u984c<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u5bfe\u6570\u95a2\u6570\u306e\u4e0d\u7b49\u5f0f<\/h3>\n\n\n\n<p>\u5bfe\u6570\u95a2\u6570\u3092\u542b\u3080\u4e0d\u7b49\u5f0f\u3092<span class=\"hutoaka\">\u5bfe\u6570\u4e0d\u7b49\u5f0f<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\[log_{2}x&gt;3\\]<\/p>\n\n\n\n<p>\\[2log_{3}(2-x)&lt;log_{3}(x+4)\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u306e\u4e0d\u7b49\u5f0f\u3092\u6e80\u305f\u3059\\(x\\)\u306e\u5909\u57df\u3092\u6c42\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5bfe\u6570\u4e0d\u7b49\u5f0f\u3092\u89e3\u304f\u3068\u304d\u306f\u3001<span class=\"red-hoso\">\u771f\u6570\u6761\u4ef6\u3068\u5e95\\(a\\)\u306e\u5024\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u771f\u6570\u6761\u4ef6<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(y=log_{a}x\\)\u306b\u304a\u3044\u3066\u3001\u771f\u6570\\(x\\)\u306f\u6b63\u306e\u6570\u3067\u3042\u308b\u3002<\/p>\n<\/div><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"395\" height=\"145\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u771f\u6570\u6761\u4ef6.png\" alt=\"\u771f\u6570\u6761\u4ef6\" class=\"wp-image-6574\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u771f\u6570\u6761\u4ef6.png 395w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u771f\u6570\u6761\u4ef6-300x110.png 300w\" sizes=\"(max-width: 395px) 100vw, 395px\" \/><\/figure>\n<\/div>\n\n\n<p>\\(b\\)\u306e\u90e8\u5206\u304c\u6b63\u3067\u3042\u308b\u3053\u3068\u306f\u5fc5\u305a\u78ba\u8a8d\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u771f\u6570\u6761\u4ef6\u3068\u3042\u308f\u305b\u3066\u3001\u5e95\\(a\\)\u306e\u5024\u306b\u3082\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6ce8\u610f\u30dd\u30a4\u30f3\u30c8<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0.a\u22601,x&gt;0\\)\u306b\u304a\u3044\u3066\u3001<\/p>\n\n\n\n<p>\\(a&gt;1\\)\u306a\u3089\u3070\u3001\\(y=log_{a}x\\)\u306f\u5897\u52a0\u95a2\u6570\u306a\u306e\u3067<\/p>\n\n\n\n<p>\\[log_{a}m&lt;log_{a}n \\Leftrightarrow m&lt;n\\]<\/p>\n\n\n\n<p>\\(0&lt;a&lt;1\\)\u306a\u3089\u3070\u3001\\(y=log_{a}x\\)\u306f\u6e1b\u5c11\u95a2\u6570\u306a\u306e\u3067<\/p>\n\n\n\n<p>\\[log_{a}m&lt;log_{a}n \\Leftrightarrow m&gt;n\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\\(a&gt;1\\)\u306e\u3068\u304d\u306f\u3001\u30b0\u30e9\u30d5\u304c\u53f3\u80a9\u4e0a\u304c\u308a\u306a\u306e\u3067\\(log_{a}m&lt;log_{a}n\\)\u306e\u3068\u304d\u3001\\(m&lt;n\\)\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"475\" height=\"280\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u4e0d\u7b49\u5f0f\u306e\u6ce8\u610f\u70b92.png\" alt=\"\u5bfe\u6570\u4e0d\u7b49\u5f0f\u3092\u89e3\u304f\u3068\u304d\u306e\u6ce8\u610f\u70b9\" class=\"wp-image-6648\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u4e0d\u7b49\u5f0f\u306e\u6ce8\u610f\u70b92.png 475w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u4e0d\u7b49\u5f0f\u306e\u6ce8\u610f\u70b92-300x177.png 300w\" sizes=\"(max-width: 475px) 100vw, 475px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\(a&gt;1\\)\u306e\u3068\u304d\u3001<\/p>\n\n\n\n<p>\\[alog_{a}m&lt;log_{a}n \\Leftrightarrow m&lt;n\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3057\u304b\u3057\u3001\\(0&lt;a&lt;1\\)\u306e\u3068\u304d\u306f\u30b0\u30e9\u30d5\u306e\u53f3\u80a9\u4e0b\u304c\u308a\u306b\u306a\u308b\u306e\u3067<span class=\"hutoaka\">\u4e0d\u7b49\u53f7\u306e\u5411\u304d\u304c\u9006<\/span>\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"581\" height=\"354\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u4e0d\u7b49\u5f0f\u306e\u6ce8\u610f\u70b91.png\" alt=\"\u5bfe\u6570\u4e0d\u7b49\u5f0f\u3092\u89e3\u304f\u3068\u304d\u306e\u6ce8\u610f\u70b9\" class=\"wp-image-6647\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u4e0d\u7b49\u5f0f\u306e\u6ce8\u610f\u70b91.png 581w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/07\/\u5bfe\u6570\u4e0d\u7b49\u5f0f\u306e\u6ce8\u610f\u70b91-300x183.png 300w\" sizes=\"(max-width: 581px) 100vw, 581px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\(0&lt;a&lt;1\\)\u306e\u3068\u304d\u3001<\/p>\n\n\n\n<p>\\[log_{a}m&lt;log_{a}n \\Leftrightarrow m&gt;n\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\u4e0d\u7b49\u5f0f\u3092\u89e3\u3044\u305f\u3089\u3001<span class=\"yellow-hoso\">\\(a\\)\u306e\u5024\u3068\u4e0d\u7b49\u53f7\u306e\u5411\u304d\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n\n\n\n<p><span class=\"hutoaka\">\u304b\u306a\u308a\u91cd\u8981\u306a\u3053\u3068\u306a\u306e\u3067\u3001\u5bfe\u6570\u4e0d\u7b49\u5f0f\u304c\u82e6\u624b\u306a\u65b9\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u5fc5\u305a\u8aad\u3080\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"douga\">\u304a\u3059\u3059\u3081\u52d5\u753b<\/h2>\n\n\n\n<p>\u300a\u3068\u3042\u308b\u7537\u304c\u6388\u696d\u3092\u3057\u3066\u307f\u305f\u300b<br>\u3010\uff12\u6b21\u95a2\u6570\u30fb\uff12\u6b21\u65b9\u7a0b\u5f0f\u30fb\uff12\u6b21\u4e0d\u7b49\u5f0f\u3011\u518d\u751f\u30ea\u30b9\u30c8<\/p>\n\n\n\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/videoseries?list=PLKRhhk0lEyzOU6a5LOPrEs7Uw2EGFCvrG\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"matome\">\u6307\u6570\u95a2\u6570\u30fb\u5bfe\u6570\u95a2\u6570\u3000\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u4eca\u56de\u306f\u6307\u6570\u95a2\u6570\u30fb\u5bfe\u6570\u95a2\u6570\u3092\u7dcf\u5fa9\u7fd2\u3067\u304d\u308b\u3088\u3046\u306b\u7db2\u7f85\u7684\u306b\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p><span class=\"huto\">\u6307\u6570\u95a2\u6570\u3068\u306f\u3001\\(a&gt;0,a\u22601\\)\u3068\u3057\u3066\\(y=a^{x}\\)\u306e\u3088\u3046\u306b\u6307\u6570\u306b\u5909\u6570\u3092\u542b\u3080\u95a2\u6570\u3067\u3059\u3002<\/span><\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u6307\u6570\u95a2\u6570<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,a\u22601\\)\u306e\u3068\u304d<\/p>\n\n\n\n<p>\\[y=a^{x}\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\\(y=a^{x}\\)\u306b\u304a\u3044\u3066\u3001\\(a\\)\u306e\u3053\u3068\u3092<span class=\"hutoaka\">\u5e95\uff08\u3066\u3044<\/span>\uff09\u3068\u3044\u3044\u3001\\(x\\)\u306e\u3053\u3068\u3092<span class=\"hutoaka\">\u6307\u6570\uff08\u3057\u3059\u3046\uff09<\/span>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<p>\\(y=log_{a}x\\)\u306e\u3088\u3046\u306a\u95a2\u6570\u3092\u3001\\(a\\)\u3092\u5e95\u3068\u3059\u308b\\(x\\)\u306e<span class=\"hutoaka\">\u5bfe\u6570\u95a2\u6570<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5bfe\u6570\u95a2\u6570<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(a&gt;0,a\u22601,x&gt;0\\)\u3068\u3059\u308b\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u95a2\u6570\u3092\u5bfe\u6570\u95a2\u6570\u3068\u3044\u3046\u3002<\/p>\n\n\n\n<p>\\[y=log_{a}x\\]<\/p>\n<\/div><\/div>\n\n\n\n<p>\\(log_{a}x\\)\u306e\\(a\\)\u306e\u90e8\u5206\u3092<span class=\"huto\">\u5e95\uff08\u3066\u3044\uff09<\/span>\u3001\\(x\\)\u306e\u5024\u3092<span 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