1/2+1/4+1/8+1/16+……+1/512
=1-1/512
=511/512
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由图可知1/2+1/4+1/8+1/16=1-1/16=15/16
故1/2+1/4+1/8+1/16+……+1/512=1-1/512=511/512
可以由前几项推出,面积就等于1-最后一项,比如1/2+1/4=1-1/4, 1/2+1/4+1/8=1-1/8 所以1/2+1/4+……+1/512=1-1/512=511/512
解毕!
1/2+1/4+1/8+1/16+……+1/512
=1-1/512
=511/512
1-1/512=511/512