求问两道prep数学

toapplezyj

1。For every positive even integer n, the function h(n) is defined to be the product of all the even integers from 2 to n, inclusive. If P is the smallest prime factor of h(100)+1, then P is:

A, between 2 and 10

B, between 10 and 20

C, between 20 and 30

D, between 30 and 40

E, Greater than 40

2.If xy=1, what's the value of 2(x+y)^2/2(x-y)^2.

Answer: E, 16.

Highly suspect question 2 has the bug...

sammy生米

建议LZ擅用前人资源，置顶的贴子有prep的解题方法，做PREP后有疑问时可以在那贴找答案

 【数学讨论链接汇总】费费，GWD/涛涛31，GMATprep，钱永强
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