[問題] 數學問題
如題, 自修又碰到困難了..請各位幫忙!題目如下
1≦x≦120, x是正整數,滿足 (x,120)=6 的x共有幾個?
我的想法是設 x=6n, 則 (n,20)=1的n有幾個
但是結果不對
請各位厲害的熱心者替我解答
順便跟我說我的想法哪裡是錯的,感恩^^
btw, 此題答案為32
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02/24 00:30, , 1F
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02/24 00:32, , 2F
02/24 00:32, 2F
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02/24 00:33, , 3F
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02/24 00:34, , 4F
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02/24 00:35, , 5F
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02/24 00:39, , 6F
02/24 00:39, 6F
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02/24 18:33, , 7F
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02/24 18:36, , 8F
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02/24 19:17, , 9F
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02/24 23:00, , 10F
02/24 23:00, 10F