求助 Prep PS1-7 43

breise

7. 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 (the correct answer)

43. A committee of three people is to be chosen from four married couples. What is the number of different committees that can be chosen if two people who are married to each other can not both serve on the committee?

A. 16

B. 24

C. 26

D. 30

E. 32 (the correct answer)

Why, thanks?

[此贴子已经被作者于2008-6-1 5:28:59编辑过]

huangxiuying

43题，4*2*2*2=32,四对夫妇中任选三对，再在每对中任选一人

smilingalone

同问第一题

望NN解答

happyself

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。选E