问两道Prep上的数学题

zhongyaya

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 and20
c.               20    30
d.               30    40
e. greater than 40

答案是e，怎么想啊？谢谢啦!

2. If the terms of sequence are t1, t2,t3,...,tn, what is the value of n?
1) the sum of the n terms is 3124
2) the average of the n terms is 4

答案是C,就是两个一起可有解。请问这道题目什么意思啊 那个term是指什么啊？

zhongyaya

谢谢两位。