(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×...×(1+1/99)×(1-1/99)=?
(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×...×(1+1/99)×(1-1/99)=?
巧算(奥数题)问:(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×...(1+1/99)×(1-1/99
(1-1/100)(1-1/99)(1-1/98)...(1-1/4)(1-1/3)(1-1/2)
100/1-1)(99/1-1)(98/1-1)…(4/1-1)(3/1-1)(2分之1-1)
(1/100-1)(1/99-1)(1/98-1).(1/4-1)(1/3-1)(1/2-1)等于多少?
(1+2/3)×(1- 2/3)×(1+2/5)×(1- 2/5)×...×(1+2/99)×(1- 2/99)=?
1-1/2+1/3-1/4+1/5-1/6…+1/99-1/100)/(1/51+1/52+1/53+…+1/99+1/
计算:1除以[1/(2*3)+1/(3*4)+.1/(99*100)=()
(1):1/1*2+1/2*3+1/3*4+1/4*5+.1/99*100=?
一道高中数列求和题1+1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+...+1/(1+2+3+...99)
(100分之1-1)(99分之1-1)(98分之1-1).(3分之1-1)(2分之1-1)
1-(1/2)+(1/3)-(1/4)+...+(1/99)-(1/100)除以(1/1+101)+(1/3+103)+