求教两道prep的题，完全没头绪。。谢谢

seiyaalice

第一题

For every positive even integer n ,the function h(n) is defined to be the product of all the evern integers friom 2 to n , inclusive . If p is the smallest prime factor of h(100 )+1，
            then p is

A between 2 and 10

Bbetween 10 and 20

Cbetween 20 and 30

Dbetween 30 and 40

Egreater than 40

 

Answer is E

题目看懂了，但是不知道该怎么做
        囧

 

 

第二道题Before being simplified ,the instructions for  computing income tax in country R were to add 2 percent of one’s  annual income to the average (arithmetic mean) of 100 units of courty R’s current and 1 percent of one’s annual income. Which of the following  represents the simplified formula by computing the income tax in country r ‘s currency for a person in that country whose anuanly income is I?

A 50+I/200

B50+3I/100

C50+I/40

D100+I/50

E100+3I/100

 

 

答案是C

 

是题目讲的税的算法就不明白，读的云里雾里的

要按自己的理解就选E了，虽然知道肯定不对，但其它选项不知道怎么算出来的。。

 

在这里先谢过nn们了，请帮忙解答一下