求救PREP模考中一题

zhj1988428

for every positive integer n, the function h(n) is defined  to be the product of the even integer 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. >40

答案：e

zhj1988428

附上答案：e

zhj1988428

LS真聪明~~~不过恕我天资愚钝，40-50内的质数是不是H(100)的约数？为何题目没有考虑进去？