1;(1-1/2^2)(1-1/3^2)(1-1/4^2)````````````(1-1/99^2)(1-1/100^
1;(1-1/2^2)(1-1/3^2)(1-1/4^2)````````````(1-1/99^2)(1-1/100^
(1-1/2)(1-1/3)(1-1/4).(1-1/99)(1-1/100)等于?
(-1*1\2)+(-1\2*1\3)+(-1\3*1\4)+.+(-1\99*1\100)
1*2/1+2*3/1+3*4/1+.98*99/1+99*100/1=?
求和:|1/2-1|+|1/3-1/2|+.+|1/99-1/98|+|1/100-1/99|
计算|1/2-1|+|1/3-1/2|+.+|1/99-1/98|+|1/100-1/99|
|1/2-1|+|1/3-1/2|+.+|1/99-1/98|+|1/100-1/99|
(1+1/1*3)*(1+1/2*4)*(1+1/3*5).(1+1/98*100)*(1+1/99*101)
(1+1/1+3)*(1+1/2*4)*(1+1/3*5)*.*(1+1/98*100)*(1+1/99*101)
计算1×2/1+2×3/1+``````+99×100/1
1/1*2+1/2*3+...+1/99*100
(-1)^1+(-1)^2+(-1)^3+(-1)^4+…+(-1)^99+(-1)^100