For every positive 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?
(1) between 2 and 10
(2) between 10 and 20
(3) between 20 and 30
(4) between 30 and 40
(5) greater than 40
Answer: (5)
有人可以幫我解釋為什麼嗎??