请教这句话意思

vancouverade

If s is the product of the integers from 100 to 200, inclusive, and t is the product of the integers from 100 to 201, inclusive, what is 1/s + 1/t in terms of t?

请教这句话意思,快疯了

jennifer1979

请问这个是哪里来的？最后的问我倒是比较不明白。前面的是S=100-200的乘积，T=100*201，这样1/s+1/t=1/s(1+1/t)我想的是。但是不明白最后的问法，还请你确认以下。

vancouverade

TS9-11 If s is the product of the integers from 100 to 200, inclusive, and t is the product of the
integers from 100 to 201, inclusive, what is 1/s + 1/t in terms of t?
A. (201)2/t
B. [(202)(201)]/t
C. 201/t
D. 202/t
E. [(202)(201)]/t2

vancouverade

这几天做MATH做到我都晕了,唉,谢谢2楼

Foreastbear

s=II(i=100)(200)  连乘从100到200, t=II(i=100)(201) 连陈从100到201；

用t 表示 1/s +1/t:

s=t/201,  结果就出来