解：原式=(1+1/2)+(2+1/4)+(3+1/8)+(4+1/16)+(5+1/32)=(1+2+3+4+5)+(1/2+1/4+1/8+1/16+1/32)=15+(1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32)=15+(1-1/32)=15又32分之31
