Q16:

For any integer k greater than 1, the symbol k^* denotes the product of all the fractions of the form ATH extrusionok="f" gradientshapeok="t" connecttype="rect">ATH>, where t is an integer between 1 and k, inclusive. What is the value of 5*/4* ?

A. 5

B. 5/4

C. 4/5

D. 1/4

E. 1/5

answer: E

5*/4* = (1/5 * 1/4*1/3 * 1/2 * 1/1) / (1/4 * 1/3 * 1/2 * 1/1) = 1/5

就这题问一个问题~~

from 1 to K 和 between 1 and K有什么区别吗?

注意本题是说 where t is an integer between 1 and k, inclusive. 既然

inclusive，包含头尾两数，则其意和from 1 to k是一样的。

gmat题目中都会注明inclusive或exclusive的...不用操心这类问题~