紧急求助一道初二整式数学题
问题描述:
紧急求助一道初二整式数学题
1/(1*2)+1/(2*3)+1/(3*4)+·····+1/(199*200)
注:*表示乘号;/表示除号
答
1/(1*2)+1/(2*3)+1/(3*4)+·····+1/(199*200)=
1-1/2+1/2-1/3+1/3-1/4.+1/199-1/200=
1-1/200=199/200