1+2+4+8+16+32+64+128=
1+2+4+8+16+32+64+128=
1+2+4+8+16+32+64+128+256……加64次等于几 1+2+4+8+16+32+64+128+256……
128+64+32+16+8+4+2+1+2/1+4/1+8/1+16/1+32/1=?
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256
1/2-1/4-1/8-16/1-32/1-64/1-128/1-256/1
2/1+4/2+8/3+16/4+32/5+64/6+128/7+256/8
简便计算1/2+1/4+1/8+1/16+1/32+1/64+1/128
1/2+1/4+1/8+1/16+32/1+1/128没有1/64简算
1/2+1/4+1/8+1/16+1/32+1/64+1/128
1+1?2+2?4+4?8+8?16+16?32+32 64+64 128+128 256+256 512+512 10
1/2+1/4+1/8+1/16+1/32+1/64+1/128=1-1/128 找规律