Question 164362
To find the inverse, first change to x,y notation.
{{{y=sqrt(x-4)}}}
Then interchange the positions of x and y and solve for y.
{{{highlight(x)=sqrt(highlight(y)-4)}}}
{{{x^2=y-4}}}
{{{y=x^2+4}}}
The solution for the new y is the inverse function.
{{{f^(-1)(x)=x^2+4}}}