prep-ds-2-2

Kath1985 · 发表于 2010-4-27 00:09:02

2.140-!-item-!-187;#058&000076

If k is a positive integer, is k the square of an integer?

(1) k is divisible by 4.

(2) k is divisible by exactly four different prime numbers.

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【答案】E

請問像條件(2)的思路是什麼不懂為何PP要用因式分解 ex 2^2*3^2*5^2* 7^2...

Kath1985 · 发表于 2010-4-27 19:58:27

ding....

prep-ds-2-2

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