4.DS
一整数除以8余几?
1.除以12余5
2.除以11余7
答案:C
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my answer is E. take 29 and 161 as examples.
8.DS
[(根号3)分之1]的K次方小于1/81,且K<12,求k。
1.k是奇数
2.k是质数
答案:b
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3^(-k/2) < 3^(-4) => k>8.
My answer is b.
[此贴子已经被作者于2002-10-9 21:35:42编辑过] |