Question

函数Y=-1/X在点A(1/2,-2)处的切线方程（过程）

Answer 1

y'=1/x^2

y'(1/2)=4

函数Y=-1/X在点A(1/2,-2)处的切线方程

y-(-2)=4(x-1/2)

4x-y-4=0