4-1/2-1/4-1/8-1/16-1/32.-1/1024
1/2+1/4+1/8+1/16+1/32.+1/1024 &
1/2+1/4+1/8+1/16+...+1/1024
1+1/2+1/4+1/8+1/16+1/32.+1/256 ?
求和:1/2+1/4+1/8+1/16+1/32+1/64+.+1/1024=?
1/2+1/4+1/8+1/16+1/32……+1/1024
1/2+1/4+1/8+1/16+1/32+1/64+.+1024=?
2/1+4/1+8/1+16/1+32/1……+1024/1=
1/2,-1/4,1/8,-1/16,1/32...求第8个数
1/2+2/4+3/8+4/16+.+10/1024
计算:1/2+1/4+1/8+1/16+………+1/1024
1024+512+256+.+2+1+2/1+4/1+8/1+.512/1+1024/1
1-1/2-1/4-1/8-1/16-1/32-.-1/512-1/1024(简便计算)