题目

初一数学(1+1/1*3)*(1+1/2*4)*(1+1/3*5)*(1+1/4*6)*...*(1+1/97*99)*(1+1/98*100)
(1+1/1*3)*(1+1/2*4)*(1+1/3*5)*(1+1/4*6)*...*(1+1/97*99)*(1+1/98*100)
本人快疯了!

提问时间：2021-03-05

答案

=(2*2)/(1*3)*(3*3)/(2*4)*(4*4)/(3*5)*(5*5)/(4*6)*******(99*99)/(98*100)
=(2方*3方****99方)/(1*2*3方****99*100)
=(2方*99方)/(1*2*99*100)
=2*99/100
=1.98