(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×……×(1+1/99)×(1-1/99)=
100/1-1)(99/1-1)(98/1-1)…(4/1-1)(3/1-1)(2分之1-1)
1-1/2+1/3-1/4+1/5-1/6…+1/99-1/100)/(1/51+1/52+1/53+…+1/99+1/
(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×...×(1+1/99)×(1-1/99)=?
计算1-(1+2)+(1+2+3)-(1+2+3+4)+…-(1+2+…+98)+(1+2+…+99)=______.
1/(1+2) + 1/(1+2+3) + 1/(1+2+3+4)……+1/(1+2+3+4+……+99+100)=(
(1/1+101+1/2+102+……+1/50+150)÷(1-1/2+1/3-1/4+……+1/99-1/100)
(1+1/2)*(1+1/3)*(1+1/4)*……*(1+1/99)*(1+1/100){要简便运算]
1/(1*2)+1/(2*3)+1*(3*4)+1/(4*5)……1/(98*99)+1/(99+100)=?
99*(1-2分之1)*(1-3分之1)*(1-4分之1)*……*(1-99分之1)
99×(1-1/2)×(1-1/3)×(1-1/4)×……×(1-1/99) 简算
(1+1×3/1)(1+2×4/1)(1+3×5/1)……(1+99×101/1)
(1+1/2)乘(1+1/3)乘(1+1/4)乘……乘(1+1/99)乘(1+1/100)等于多少?