请教一道prep模考中遇到的数学题

scarlett8327

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(  )

the answer is :

E. greater than 40

Somebody tell me how to slove this problem???

scarlett8327

another one:

if x > y^2 > z^4, which of the following could be true?

1. x>y>z

2. z>y>x

3. x>z>y

the answer is 1,2,3

我对于可用特殊值处理的题目总是有点不上手。。。

重庆太阳

1 .   x=2>y=1/2>z=1/3           x=2=>y^2=1/4>Z^4=1/81

2.   Z=1/2>Y=1/3>X=1/4          x=1/4>y^2=1/9>z^4=1/16

3.    x=2>z=1/3>y=-1/2          x=2>y^2=1/4>z^4=1/81

 第一个我也做不来   请高人指点啊

scarlett8327

谢谢第二题的解答，我硬是么想到<0的情况。。。 - -

继续请nn指教第一题~

alibaba_2009

no.1

please go to http://www.beatthegmat.com/the-smallest-prime-factor-of-h-100-1-t35932.html

scarlett8327

many thanks~~~