1.
f'(x)=3x^2+1/x^2
f'(1)=3+1=4
切线方程为y-0=4(x-1),整理,得y=4x-4
2.
x=1 y=f(x)=2
f'(x)=6x^2
f'(1)=6
切线方程为y-2=6(x-1),整理,得y=6x-4