Mathematics
Senior High
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演習問題 23
3つの集合U, A, B を次のように定める.
U={xxは200以下の自然数},
A={xxは5の倍数}, B={xxは4でわると2余る数 }
このとき、次の問いに答えよ. ただし, ACU, BCU とする.
(1)n(A), n (B) を求めよ.
(2)n (A∩B) を求めよ.
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どうもありがとうございます