1/2+1/4+1/8= 1-1/2+1/2-1/4+1/4-1/8=1-1/8=7/81/2+1/4+1/8+1/16= 1-1/2+1/2-1/4+1/4-1/8+1/8-1/16=1-1/16=15/161/2+1/4+1/8+1/16+1/32= 1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32=1-1/32=31/321/2+1/4+1/8+1/16+1/...