先找规律然后再按规律计算:

问题描述:

先找规律然后再按规律计算:
1/2+1/4=3/4
1/2+1/4+1/8=7/8
1/2+1/4+1/8+1/16=15/16
1/2+1/4+1/8+1/16+1/32=31/32
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256=?

是找规律的题1/2+1/4=3/4=(2的2次方-1)/(2的2次方) 1/2+1/4+1/8=7/8=(2的3次方-1)/(2的3次方) 1/2+1/4+1/8+1/16=15/16=(2的4次方-1)/(2的4次方)1/2+1/4+1/8+1/16+1/32=31/32=(2的5次方-1)/(2的5次方...