1⼀2+1⼀4+1⼀8+.+1⼀128怎么算?

2025-03-22 05:50:33
推荐回答(1个)
回答1:

令S=1/2+1/4+1/8+1/16+1/32+1/64+1/128
2S=1+1/2+1/4+1/8+1/16+1/32+1/64
2S-S=1-1/128
S=127/128