(x+y2)+(2x+1/1*2*y2)+...+(9x+1/8*9*y2)

如下：当x=1/9,y=-3时,原式＝（1+2+3+…+9）x+[1+(1/1×2)+(1/2×3)+…+(1/8×9)]y=(1+9)×9/2x+[1+(1-1/2)+(1/2-1/3)+(1/3-1/4)+…+(1/8-1/9)]y=45x+(1+1-1/9)y=45x+17/9y=45(1/9)+17/9·9=5+17=22