解 求导y'=(1/4)(-2)(1/x³)=-（1）当x=2时y=1/8y'=(1/4)(-2)(1/x³)=-1/16所以抛物线y=1/4x²在x=2处的切线的方程是y-1/8=(-1/16)(x-2)(2)当x=-2时y=1/8y'=(1/4)(-2)(1/x³)=1/16所以抛物线y=1/4x&...