1+1/2+1/4+1/8+1/16.1/1024
=1+(1-1/2)+(1/2-1/4)+(1/4-1/8)+(1/8-1/16)+.+(1/512-1/1024)
=1+1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+.+1/512-1/1024
=1+1-1/1024
=2-1/1024
=1又1024分之1023
1+1/2+1/4+1/8+1/16.1/1024
=1+(1-1/2)+(1/2-1/4)+(1/4-1/8)+(1/8-1/16)+.+(1/512-1/1024)
=1+1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+.+1/512-1/1024
=1+1-1/1024
=2-1/1024
=1又1024分之1023