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30. x=a^2,问x的positive factor 个数 I odd II even III质数个,我选的I,当时证明的,不知道对不对。 参考答案:I 思路: I odd=》4(1,2,4);9(1,3,9);16(1,2,4,8,16) II even=》略 III质数个=》100(1,2,4,5,10,20,25,50,100)
讨论里面做出来1
但是如果a是0呢? 0不就没有positive factor了么?
The Yale School of Management was founded in 1976 and offers a two-year MBA program. The program is mid-size and specializes in non-profit management, strategy and finance. |
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