1/2+1/4+1/8+1/16+1/34=的简便算法,.
3个回答

题错了吧.应该是:1/2+1/4+1/8+1/16+1/32.一般这样出题

若是:1/2+1/4+1/8+1/16+1/34

=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/34

=1--1/16+1/34

=15/16+1/34

=263/272

若是:1/2+1/4+1/8+1/16+1/32

=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32

=1-1/32

=31/32