Question

How do you find derivative of inverse function of f(x)=2x+3?

Answer 1

y=2x+3

y -3 =2x

x =

$\frac{y -3 }{2}$

therefore REQUIRED inverse function is

$y = \frac{x - 3}{2} \\ \frac{dy}{dx} = \frac{1}{2}$