1/(1*2)+1/(2*3)+1/(3*4)...1/(100*101)这道题我忘记咋做了求过程和答案!
问题描述：
1/(1*2)+1/(2*3)+1/(3*4)...1/(100*101)这道题我忘记咋做了求过程和答案!
答
算这题前 你先算算这个
1/(1*2)=1/2
1/(1*2)+1/(2*3)=2/3
1/(1*2)+1/(2*3)+1/(3*4)=3/4
所以
1/(1*2)+1/(2*3)+1/(3*4)...1/(100*101)=100/101