y=x²/4y'=x/2,当x=2时,y'=1抛物线y=x²/4在点(2,1)处切线的斜率为1,则抛物线y=x²/4在点(2,1)处法线的斜率为-1该法线方程为y=-x+3,代入y=x²/4,有-x+3=x²/4,得x=-6或x=2法线y=-x+3与抛物线y=x...