Key Steps in Finding the Inverse Function of a Quadratic Function Replace f ( x) f (x) f (x) by y y y. Switch the roles of x \color {red}x x and y \color {blue}y y. In

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inverse\:y=\frac{x^2+x+1}{x} inverse\:f(x)=x^3; inverse\:f(x)=\ln (x-5) inverse\:f(x)=\frac{1}{x^2} inverse\:y=\frac{x}{x^2-6x+8} inverse\:f(x)=\sqrt{x+3} inverse\:f(x)=\cos(2x+5)