If S is the product of the integers from 100 to 200,inclusive,一道GMAT数学题.
问题描述:
If S is the product of the integers from 100 to 200,inclusive,一道GMAT数学题.
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 if
答
t=201s s=t/201
1/s+1/t
=1/(t/201)+1/t
=201/t+1/t
=202/t