1/2+1/4+1/8+1/16+1/32+1/64+1/128等于多少?一定要简算啊!别太复杂了,急,
人气:101 ℃ 时间:2019-08-21 10:56:58
解答
将原式加上 1/128,再减去 1/128得
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/128-1/128
=1/2+1/4+1/8+1/16+1/32+1/64+1/64-1/128
=1/2+1/4+1/8+1/16+1/32+1/32-1/128
=.
=1-1/128
=127/128
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