用64分别除以2、4、8、16、32...结果就是:(32+16+8+4+2+1)除以64
1/2=1-1/21/4=1/2-1/41/8=1/4-1/81/16=1/8-1/161/32=1/16-1/321/64=1/32-1/64∴1/2+1/4+1/8+1/16+1/32+1/64=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32+1/32-1/64=1-1/64=63/64
1/2=1-1/21/4=1/2-1/41/8=1/4-1/81/16=1/8-1/16……然后加起来就是:1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32+1/32-1/64=1-1/64=63/64