求Prep解题

piggykenzhu · 发表于 2009-12-27 14:31:18

求解：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

另问有谁有prep题的详解吗？？

vivian7765 · 发表于 2009-12-27 14:51:45

E
h(100)+1=2*4*6*...*100+1=2^50*50!+1显然，1到50都不可以整除这个代数式，所以比50大。

求Prep解题

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