计算:1/4+1/8+16/1+1/32+1/64+1/128+1/256大神们帮帮忙1/4+1/8+16/1+1/32+1/64+1/128+1/256=( ) ..
问题描述:
计算:1/4+1/8+16/1+1/32+1/64+1/128+1/256大神们帮帮忙
1/4+1/8+16/1+1/32+1/64+1/128+1/256=( ) ..
答
小学方法:=1/4*(1+1/2+1/4+1/8+1/16+1/32+1/64) =1/4*[(64+32+16+8+4+2+1)/64] =1/4*[(64+16+32+8+4+2+1)/64] =1/4*(127/64) =127/256