PP-DS-169

tart

If the integers a and n are greater than 1 and the product of the first 8 positive integers is a multiple of a^n, what is the value of a ?

(1) an = 64

(2) n = 6
------------------------------------------------------------------------------------------------------------------------------------------【答案】B

【思路】(1) = 64 , =64 , =64 , not sufficient
(2) n = 6 , = 64 , sufficient

我做的时候选了C，不太明白B是怎么单独得到的，另外想请问这句话
product of the first 8 positive integers is a multiple of a^n的意思是1*2*3*4*5*6*7*8是a^n的倍数么？？