{"id":648,"date":"2025-12-24T17:20:36","date_gmt":"2025-12-24T08:20:36","guid":{"rendered":"https:\/\/math-travel.com\/?p=648"},"modified":"2026-02-11T17:03:50","modified_gmt":"2026-02-11T08:03:50","slug":"element","status":"publish","type":"post","link":"https:\/\/math-travel.jp\/math-a\/element\/","title":{"rendered":"\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u306e\u6c42\u3081\u65b9\u30fc\u30d9\u30f3\u56f3\u3092\u4f7f\u3063\u3066\u300c\u91cd\u306a\u308a\u300d\u3092\u6b63\u3057\u304f\u8a08\u7b97\u3059\u308b\u624b\u9806"},"content":{"rendered":"\n
\u4eca\u56de\u89e3\u6c7a\u3059\u308b\u60a9\u307f<\/span><\/div>
\n

\u300c\u96c6\u5408\u306e\u8981\u7d20\u3063\u3066\u306a\u3093\u306e\u3053\u3068\uff1f\u300d <\/p>\n\n\n\n

\u300c\u8981\u7d20\u306e\u6570\u3048\u65b9\u304c\u5206\u304b\u3089\u306a\u3044\u300d<\/p>\n<\/div><\/div>\n\n\n\n

\u4eca\u56de\u306f\u6570A\u304b\u3089\u3001\u96c6\u5408\u306e\u8981\u7d20\u306b\u3064\u3044\u3066\u306e\u60a9\u307f\u3092\u89e3\u6c7a\u3057\u3066\u3044\u304f\u3088\uff01<\/p>\n\n\n

\"\"\u9ad8\u6821\u751f<\/span><\/div>
\n

\u8981\u7d20\u306e\u500b\u6570\u3068\u3044\u3046\u306e\u304c\u30a4\u30de\u30a4\u30c1\u5206\u304b\u3089\u306a\u304f\u3066\u6559\u3048\u3066\u6b32\u3057\u3044\u3067\u3059\u3002<\/p>\n<\/span><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n

\u307e\u305a\u306f\u3053\u3061\u3089\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n

\u96c6\u5408\u306e\u8981\u7d20<\/span><\/div>
\n

\u96c6\u5408A\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\\[A=\\{1,3,5,7\\}\\]<\/p>\n\n\n\n

\u3053\u306e\u3068\u304d\u96c6\u5408A\u306b\u542b\u307e\u308c\u308b\u3001\\(1,3,5,7\\)\u3092\u96c6\u5408\u306e\u8981\u7d20\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n

\u96c6\u5408\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u6570\u5b57\u3084\u6587\u5b57\u306e\u3053\u3068<\/span>\u3092\u96c6\u5408\u306e\u8981\u7d20<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u3064\u307e\u308a\u3001\u4eca\u56de\u306e\u30c6\u30fc\u30de\u3067\u3042\u308b”\u8981\u7d20\u306e\u500b\u6570”\u3068\u3044\u3046\u306e\u306f\u3001\u3044\u304f\u3064\u8981\u7d20\u304c\u5165\u3063\u3066\u3044\u308b\u304b\u3092\u6570\u3048\u308b\u3060\u3051<\/span>\u306e\u7c21\u5358\u306a\u8a71\u3067\u3059\u3002<\/p>\n\n\n\n

\u5b9a\u671f\u30c6\u30b9\u30c8\u3067\u3082\u5f97\u70b9\u6e90\u306b\u3057\u305f\u3044\u5358\u5143<\/span>\u306a\u306e\u3067\u3001\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u5fc5\u305a\u7406\u89e3\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n

\u672c\u8a18\u4e8b\u3067\u306f\u3001\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n\n\n

\"\"\u30b7\u30fc\u30bf<\/span><\/div>
\n

\u8d85\u57fa\u672c\u306a\u306e\u3067\u5fc5\u305a\u7406\u89e3\u3057\u3066\u304a\u3053\u3046\uff01<\/p>\n<\/span><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n

\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570<\/h2>\n\n\n\n

\u307e\u305a\u3001\u96c6\u5408\u306b\u542b\u307e\u308c\u308b\u6570\u5b57\u3084\u6587\u5b57\u3092\u96c6\u5408\u306e\u8981\u7d20<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u96c6\u5408\u306e\u8981\u7d20<\/span><\/div>
\n

\u96c6\u5408A\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\\[A=\\{1,3,5,7\\}\\]<\/p>\n\n\n\n

\u3053\u306e\u3068\u304d\u96c6\u5408A\u306b\u542b\u307e\u308c\u308b\u3001\\(1,3,5,7\\)\u3092\u96c6\u5408\u306e\u8981\u7d20\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n

\u305d\u3057\u3066\u3001\u8981\u7d20\u304c\u3044\u304f\u3064\u5165\u3063\u3066\u3044\u308b\u304b\u3092”\u8981\u7d20\u306e\u500b\u6570”\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\\[A=\\{1,3,5,7\\}\\]<\/p>\n\n\n\n

\u3053\u306e\u5834\u5408\u3060\u3068\u30011,3,5,7\u306e4\u3064\u306e\u8981\u7d20\u304c\u5165\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u96c6\u5408A\u306e\u8981\u7d20\u306e\u500b\u6570\u306f4<\/span>\u3067\u3059\u3002<\/p>\n\n\n\n

\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u306f\\(n(A)\\)\u3068\u8868\u3057\u3001<\/p>\n\n\n\n

\n

\\[A=\\{1,3,5,7\\}\\]<\/p>\n\n\n\n

\\[n(A)=4\\]<\/p>\n<\/div><\/div>\n\n\n\n

\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n

\n
\"\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\"<\/figure>\n<\/div>\n\n
\"\"\u9ad8\u6821\u751f<\/span><\/div>
\n

\u8981\u7d20\u306e\u7a2e\u985e\u3067\u306f\u306a\u304f\u3001\u500b\u6570\u306a\u306e\u3067\u6ce8\u610f\u3067\u3059\u306d\uff01<\/p>\n<\/span><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n

\u5171\u901a\u90e8\u5206\u306e\u8981\u7d20<\/h2>\n\n\n\n

\u8907\u6570\u306e\u96c6\u5408\u304c\u3042\u308b\u5834\u5408\u3001\u91cd\u306a\u3063\u3066\u308b\u3068\u3053\u308d\u3092\u5171\u901a\u90e8\u5206<\/span>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n

\n
\"\u5171\u901a\u90e8\u5206\u306e\u8981\u7d20\"<\/figure>\n<\/div>\n\n\n

\u4e0a\u56f3\u306e\u5834\u5408\u3001\u5171\u901a\u90e8\u5206\u306b\u3042\u308b\u8981\u7d20\u306f<\/p>\n\n\n\n

\\[A \\cap B=\\{3,4,5\\}\\]<\/p>\n\n\n\n

\u3068\u306a\u308a\u3001\u5171\u901a\u90e8\u5206\\(A \\cap B\\)\u306e\u8981\u7d20\u306e\u500b\u6570\u306f<\/p>\n\n\n\n

\\[n(A \\cap B)=3\\]<\/p>\n\n\n\n

\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u5171\u901a\u90e8\u5206\u3068\u548c\u96c6\u5408<\/span><\/p>\n\n\n\n

\u96c6\u5408\u306b\u51fa\u3066\u304f\u308b\u8a18\u53f7\u3092\u3057\u3063\u304b\u308a\u7406\u89e3\u3067\u304d\u3066\u3044\u307e\u3059\u304b\uff1f<\/p>\n\n\n\n

\"\u5171\u901a\u90e8\u5206\u306e\u8a18\u53f7\"<\/figure>\n\n\n\n
\"\u548c\u96c6\u5408\u306e\u8a18\u53f7\"<\/figure>\n\n\n\n

\u5171\u901a\u90e8\u5206\u300cA\u304b\u3064B\u300d\u3092\\(A \\cap B\\)\u3001\u548c\u96c6\u5408\u300cA\u307e\u305f\u306fB\u300d\u3092\\(A \\cup B\\)\u3068\u3057\u3066\u3001\u96c6\u5408\u306e\u8a18\u53f7\u3092\u4f7f\u3063\u3066\u8868\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u548c\u96c6\u5408\\(\\cup\\)\u306e\u8981\u7d20<\/h2>\n\n\n\n

\u8907\u6570\u306e\u96c6\u5408\u304c\u3042\u308b\u5834\u5408\u3001\u96c6\u5408\u5168\u4f53\u306e\u3053\u3068\u3092\u548c\u96c6\u5408<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n

\n
\"\u548c\u96c6\u5408\u306e\u8981\u7d20\"<\/figure>\n<\/div>\n\n\n
\u548c\u96c6\u5408\u306e\u8981\u7d20<\/span><\/div>
\n

\\begin{eqnarray}
A&=&\\{1,4,5,5,6\\}\\\\
B&=&\\{4,5,6,a,c,c\\}\\\\
A \\cup B&=&\\{1,4,5,5,6,a,c,c\\}
\\end{eqnarray}<\/p>\n<\/div><\/div>\n\n\n\n

\u3053\u306e\u5834\u5408\u3001\u548c\u96c6\u5408\\(A \\cup B\\)\u306e\u8981\u7d20\u306e\u500b\u6570\u306f<\/p>\n\n\n\n

\\[n(A \\cup B)=8\\]<\/p>\n\n\n\n

\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n

\"\"\u9ad8\u6821\u751f<\/span><\/div>
\n

\u96c6\u5408\u306e\u8a18\u53f7\u3067\u6df7\u4e71\u3059\u308b\u3068\u304d\u304c\u3042\u308a\u307e\u3059<\/p>\n<\/span><\/span><\/span><\/div><\/div><\/div><\/div>\n\n

\"\"\u30b7\u30fc\u30bf<\/span><\/div>
\n

\u96c6\u5408\u306e\u8a18\u53f7\u306b\u3064\u3044\u3066\u306f\u5225\u306e\u8a18\u4e8b\u3067\u307e\u3068\u3081\u3066\u3044\u308b\u3088<\/p>\n<\/span><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n

\u8981\u7d20\u306e\u500b\u6570\u3092\u6c42\u3081\u308b\u6587\u7ae0\u984c<\/h2>\n\n\n\n

\u8981\u7d20\u306e\u500b\u6570\u306f\u6587\u7ae0\u984c\u3067\u51fa\u984c\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u8981\u7d20\u306e\u500b\u6570\u300a\u6587\u7ae0\u984c\u300b<\/span><\/div>
\n

50\u4eba\u306e\u751f\u5f92\u306b\u6570\u5b66\u3068\u82f1\u8a9e\u306e\u8a66\u9a13\u3092\u884c\u3063\u305f\u3002
\u6570\u5b66\u306e\u5408\u683c\u8005\u306f25\u4eba\uff0c\u82f1\u8a9e\u306e\u5408\u683c\u8005\u306f30\u4eba\uff0c2\u79d1\u76ee\u3068\u3082\u306b\u4e0d\u5408\u683c\u3067\u3042\u3063\u305f\u8005\u306f5\u4eba\u3067\u3042\u3063\u305f\u3002
(1) 2\u79d1\u76ee\u3068\u3082\u5408\u683c\u3057\u305f\u306e\u306f\u4f55\u4eba\uff1f
(2) \u6570\u5b66\u3060\u3051\u5408\u683c\u3057\u305f\u306e\u306f\u4f55\u4eba\uff1f<\/p>\n<\/div><\/div>\n\n\n\n

\u610f\u5916\u306b\u601d\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3053\u308c\u306f\u96c6\u5408\u306e\u554f\u984c\u3067\u554f\u984c\u6587\u3092\u30d9\u30f3\u56f3\u306b\u3059\u308b\u3068\u4e0b\u56f3\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n

\n
\"\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u306e\u6587\u7ae0\u984c\"<\/figure>\n<\/div>\n\n\n

(1) 2\u79d1\u76ee\u3068\u3082\u5408\u683c\u3057\u305f\u306e\u306f\u4f55\u4eba\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

50\u4eba\u306e\u3046\u3061\u30012\u6559\u79d1\u3068\u3082\u4e0d\u5408\u683c\u3067\u3042\u3063\u305f\u8005\u306f5\u4eba\u306a\u306e\u3067\u3001\u6b8b\u308a\u306e45\u4eba\u306f\u6570\u5b66\u3001\u82f1\u8a9e\u306e\u3044\u305a\u308c\u304b\u306b\u306f\u5408\u683c\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308b\u3002<\/p>\n\n\n\n

\\[n(\u6570\u5b66 \\cup \u82f1\u8a9e)=45\\]<\/p>\n\n\n\n

\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u6570\u5b66\u306e\u5408\u683c\u8005\u306f25\u4eba\uff0c\u82f1\u8a9e\u306e\u5408\u683c\u8005\u306f30\u4eba\u3092\u5408\u308f\u305b\u308b\u306855\u4eba\u306a\u306e\u3067\u300145\u4eba\u3092\u8d85\u3048\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n\n\n\n

\u3053\u306e\u8d85\u904e\u5206\u306e10\u4eba\u304c\u6570\u5b66\u3068\u82f1\u8a9e\u306e2\u79d1\u76ee\u306b\u5408\u683c\u3057\u305f\u4eba\u306e\u4eba\u6570<\/span>\u3067\u3059\u3002<\/p>\n\n\n

\n
\"\u5171\u901a\u90e8\u5206\u306e\u6587\u7ae0\u984c\"<\/figure>\n<\/div>\n\n\n

\\begin{eqnarray}
n(\u6570\u5b66 \\cap \u82f1\u8a9e)&=&n(\u6570\u5b66)+n(\u82f1\u8a9e)-n(\u6570\u5b66 \\cup \u82f1\u8a9e)\\\\
&=&25+30-45\\\\
&=&10
\\end{eqnarray}<\/p>\n\n\n\n

(2) \u6570\u5b66\u3060\u3051\u5408\u683c\u3057\u305f\u306e\u306f\u4f55\u4eba\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n

\n
\"\u96c6\u5408\u306e\u6587\u7ae0\u984c\"<\/figure>\n<\/div>\n\n\n

(1)\u3067\\(n(\u6570\u5b66 \\cap \u82f1\u8a9e)=10\\)\u3068\u5206\u304b\u3063\u305f\u306e\u3067\u3001\u6570\u5b66\u3060\u3051\u306b\u5408\u683c\u3057\u305f\u306e\u306f\u6b8b\u308a\u306e15\u4eba\u3060\u3068\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u4ee5\u4e0a\u304c\u3001\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u3092\u7528\u3044\u305f\u6587\u7ae0\u984c\u3067\u3059\u3002<\/p>\n\n\n\n

\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u300a\u7df4\u7fd2\u554f\u984c\u300b<\/h2>\n\n\n
\n
\"\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570<\/figure>\n<\/div>\n\n\n

\u305b\u3063\u304b\u304f\u96c6\u5408\u306e\u8981\u7d20\u306b\u3064\u3044\u3066\u7406\u89e3\u3067\u304d\u305f\u306e\u3067\u3001\u7df4\u7fd2\u554f\u984c\u306b\u6311\u6226\u3057\u3066\u3082\u3063\u3068\u7406\u89e3\u3092\u6df1\u3081\u3088\u3046\uff01<\/span><\/p>\n\n\n\n

\u7df4\u7fd2\u554f\u984c\u2460<\/span><\/div>
\n

100\u4ee5\u4e0b\u306e\u81ea\u7136\u6570\u306e\u3046\u3061\u3001\u6b21\u306e\u3088\u3046\u306a\u500b\u6570\u3092\u6c42\u3081\u3088\u3002
(1)\u30003\u306e\u500d\u6570
(2)\u30007\u306e\u500d\u6570
(3)\u30003\u306e\u500d\u6570\u307e\u305f\u306f\uff17\u306e\u500d\u6570<\/p>\n<\/div><\/div>\n\n\n\n

\u89e3\u8aac<\/span><\/p>\n\n\n\n

(1)\u30003\u306e\u500d\u6570\u306e\u500b\u6570<\/p>\n\n\n\n

100\u4ee5\u4e0b\u306e\u81ea\u7136\u6570\u5168\u4f53\u306e\u96c6\u5408\u3092U\u3068\u3057\u3066\u3001U\u306e\u90e8\u5206\u96c6\u5408\u30673\u306e\u500d\u6570\u3092\u96c6\u5408A\u30017\u306e\u500d\u6570\u3092\u96c6\u5408B\u3068\u3059\u308b\u3068\u3001<\/p>\n\n\n\n

\\[A=\\{3\\times{1}, 3\\times{2},…,3\\times{33}\\}\\]
\\[B=\\{7\\times{1}, 7\\times{2},…,7\\times{14}\\}\\]<\/p>\n\n\n\n

\u3057\u305f\u304c\u3063\u3066\u3001100\u4ee5\u4e0b\u306e\u81ea\u7136\u6570\u306b3\u306e\u500d\u6570\u306f33\u500b\u3042\u308b\u3002<\/p>\n\n\n\n

\\[n(A)=33\\]<\/span><\/p>\n\n\n\n

(2)\u30007\u306e\u500d\u6570\u306e\u500b\u6570<\/p>\n\n\n\n

\u540c\u69d8\u306b\u3001100\u4ee5\u4e0b\u306e\u81ea\u7136\u6570\u306b7\u306e\u500d\u6570\u306f14\u500b\u3042\u308b\u3002<\/p>\n\n\n\n

\\[n(B)=14\\]<\/span><\/p>\n\n\n\n

(3)\u30003\u306e\u500d\u6570\u307e\u305f\u306f\uff17\u306e\u500d\u6570<\/p>\n\n\n

\n
\"3\u306e\u500d\u6570\u307e\u305f\u306f7\u306e\u500d\u6570\"<\/figure>\n<\/div>\n\n\n

3\u306e\u500d\u6570\u307e\u305f\u306f7\u306e\u500d\u6570\u306a\u306e\u3067\u3001\u6c42\u3081\u308b\u306e\u306f\\(n(A \\cup B)\\)\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

\\[n(A \\cup B)=n(A)+n(B)-n(A \\cap B)\\]<\/p>\n\n\n\n

\\(n(A \\cap B)\\)\u306f\u3001\u300c3\u306e\u500d\u6570\u304b\u30647\u306e\u500d\u6570\u300d\u306a\u306e\u306721\u306e\u500d\u6570\u304c\u3044\u304f\u3064\u3042\u308b\u304b\u3092\u6c42\u3081\u308c\u3070\u826f\u3044\u3002<\/p>\n\n\n\n

\\[A \\cap B =\\{21\\times{1},21\\times{2},…,21\\times{4}\\}\\]<\/p>\n\n\n\n

\u3088\u3063\u3066\u3001\\(n(A \\cap B)=4\\)<\/p>\n\n\n\n

\u3053\u308c\u3092\u7528\u3044\u3066<\/p>\n\n\n\n

\\begin{eqnarray}
n(A \\cup B)&=&n(A)+n(B)-n(A \\cap B)\\\\
&=&33+14-4\\\\
&=&43
\\end{eqnarray}<\/p>\n\n\n\n

\u7df4\u7fd2\u554f\u984c\u2461<\/span><\/div>
\n

100\u4eba\u3092\u5bfe\u8c61\u306b\u30012\u3064\u306e\u63d0\u6848a,b\u306e\u8cdb\u5426\u3092\u8abf\u3079\u305f\u3068\u3053\u308d\u3001a\u306b\u8cdb\u6210\u306e\u4eba\u306f67\u4eba
b\u306b\u8cdb\u6210\u306e\u4eba\u306f84\u4eba\u3001a\u306b\u3082b\u306b\u3082\u8cdb\u6210\u306e\u4eba\u306f60\u4eba\u3044\u305f\u3002
a\u306b\u3082b\u306b\u3082\u8cdb\u6210\u3067\u306f\u306a\u3044\u4eba\u306f\u4f55\u4eba\u3044\u308b\u304b\u3002<\/p>\n<\/div><\/div>\n\n\n\n

\u89e3\u8aac<\/span><\/p>\n\n\n\n

\u3053\u306e100\u4eba\u3092\u5168\u4f53\u96c6\u5408U\u3068\u3057\u3066\u3001a\u306b\u8cdb\u6210\u306e\u4eba\u306e\u96c6\u5408\u3092A\u3001b\u306b\u8cdb\u6210\u306e\u4eba\u306e\u96c6\u5408\u3092B\u3068\u3059\u308b\u3068\u3001<\/p>\n\n\n\n

\\[n(A)=67 \\quad n(B)=84 \\quad n(A \\cap B)=60\\]<\/p>\n\n\n\n

a\u306b\u3082b\u306b\u3082\u8cdb\u6210\u3067\u306a\u3044\u4eba\u306e\u96c6\u5408\u306f\\(\\overline{ A } \\cap \\overline{ B }\\)\u3001\u3059\u306a\u308f\u3061\\(\\overline{ A \\cup B }\\)\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

\\begin{eqnarray}
n(A \\cup B )&=&n(A)+n(B)-n(A \\cap B)\\\\
&=&67+84-60\\\\
&=&91
\\end{eqnarray}<\/p>\n\n\n\n

\u3088\u3063\u3066,<\/p>\n\n\n\n

\\begin{eqnarray}
n(\\overline{ A \\cup B })&=&n(U)-n(A \\cup B)\\\\
&=&100-91\\\\
&=&9
\\end{eqnarray}<\/p>\n\n\n\n

\u3057\u305f\u304c\u3063\u3066\u3001a\u306b\u3082b\u306b\u3082\u8cdb\u6210\u3067\u306f\u306a\u3044\u4eba\u306f9\u4eba\u3044\u308b\u3002<\/p>\n\n\n\n

\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u3000\u307e\u3068\u3081<\/h2>\n\n\n
\n
\"\u96c6\u5408\u306e\u8981\u7d20\u3068\u500b\u6570\u307e\u3068\u3081\"<\/figure>\n<\/div>\n\n\n

\u4eca\u56de\u306f\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u306b\u3064\u3044\u3066\u9806\u3092\u8ffd\u3063\u3066\u78ba\u8a8d\u3057\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u610f\u5473\u3055\u3048\u5206\u304b\u3063\u3066\u3057\u307e\u3048\u3070\u3001\u305d\u3053\u307e\u3067\u96e3\u3057\u3044\u8a71\u3067\u3082\u306a\u3044\u306e\u3067\u3053\u306e\u6a5f\u4f1a\u3067\u7406\u89e3\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/span><\/p>\n\n\n\n

\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570<\/span><\/div>
\n

\\[A=\\{1,3,5,7\\}\\]<\/p>\n\n\n\n

\\[n(A)=4\\]<\/p>\n<\/div><\/div>\n\n\n

\n
\"\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\"<\/figure>\n<\/div>\n\n\n

\u8981\u7d20\u306e\u7a2e\u985e\u3067\u306f\u306a\u304f\u3001\u8981\u7d20\u306e\u500b\u6570\u306a\u306e\u3067\u6ce8\u610f<\/span>\u3067\u3059\u3002<\/p>\n\n\n\n

\u96c6\u5408\u3067\u4f7f\u3046\u8a18\u53f7\u306b\u3064\u3044\u3066\u306f\u30b3\u30c1\u30e9\u306e\u8a18\u4e8b\u3067\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\uff1e\u3010\u96c6\u5408\u306e\u8a18\u53f7\u3011\u62bc\u3055\u3048\u3066\u304a\u304d\u305f\u3044\uff16\u3064\u306e\u8a18\u53f7\uff06\uff13\u500b\u306e\u6cd5\u5247<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4eca\u56de\u306f\u6570A\u304b\u3089\u3001\u96c6\u5408\u306e\u8981\u7d20\u306b\u3064\u3044\u3066\u306e\u60a9\u307f\u3092\u89e3\u6c7a\u3057\u3066\u3044\u304f\u3088\uff01 \u307e\u305a\u306f\u3053\u3061\u3089\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 \u96c6\u5408\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u6570\u5b57\u3084\u6587\u5b57\u306e\u3053\u3068\u3092\u96c6\u5408\u306e\u8981\u7d20\u3068\u3044\u3044\u307e\u3059\u3002 \u3064\u307e\u308a\u3001\u4eca\u56de\u306e\u30c6\u30fc\u30de\u3067\u3042\u308b”\u8981\u7d20\u306e\u500b\u6570”\u3068\u3044\u3046 […]<\/p>\n","protected":false},"author":1,"featured_media":4151,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[15,223],"tags":[9,10,11],"class_list":["post-648","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-number","category-math-a","tag-9","tag-a","tag-11"],"yoast_head":"\n\u96c6\u5408\u306e\u8981\u7d20\u306e\u500b\u6570\u306e\u6c42\u3081\u65b9\u30fc\u30d9\u30f3\u56f3\u3092\u4f7f\u3063\u3066\u300c\u91cd\u306a\u308a\u300d\u3092\u6b63\u3057\u304f\u8a08\u7b97\u3059\u308b\u624b\u9806<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/math-travel.jp\/math-a\/element\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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