4分之3加16分之3加64分之3加256分之3 怎么简算?

问题描述:

4分之3加16分之3加64分之3加256分之3 怎么简算?

3/4+3/16+3/63+3/256=1-1/4+(1/4)×(3/4)+(1/4)×(1/4)×(3/4)+(1/4)×(1/4)×(1/4)×(3/4)=1-(1/4)(1-3/4)+(1/4)×(1/4)×(3/4)+(1/4)×(1/4)×(1/4)×(3/4)=1-(1/4)×(1/4)+(1/4)×(1/4)×(3/4)...