Tolong d kerjakan kaka beserta caranya

f(x)=3/x² - 1/x
f(x)=3x⁻²-x⁻¹
f'(x)=(3x-2)x⁻²⁻¹ - (-1x⁻¹⁻¹)
f'(x)=-6x⁻³ +1x⁻²...(a)