Question

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!

Answer 1

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