(1-1/2+1/3-1/4.-1/100)/(1/50+1/51+1/52.+1/100)=?

Question

(1-1/2+1/3-1/4.-1/100)/(1/50+1/51+1/52.+1/100)=?

Answer 1

(1-1/2+1/3-1/4.-1/100)
=(1+1/2+1/3+1/4.+1/100)-2*(1/2+1/4+1/6+.1/100)
=(1+1/2+1/3+1/4.+1/100)-(1+1/2+1/3+1/4+.1/50)
=1/51+1/52+1/53.+1/100
所以你的答案是1,懂了吗?
最好教会她自己研究,我以前也没遇到这种问题,但只要领悟了数学,其实这种变换很简单的.
差点跟着一起错,题目你肯定打错了.