求解此题?

2020-07-22 15:04

问题补充:
r3CYmuTa
0 0

裂项原式=1-1/100=99/1001/(1×2)=1-1/21/(2×3)=1/2-1/3..............

bXuk9J8L
0 0

裂项原式=1-1/100=99/1001/(1×2)=1-1/21/(2×3)=1/2-1/3..............

wLKNxjny
0 0