Learn about function notation, how to find an inverse function by changing the subject, and how to work with composite functions.

To find an inverse function, form an equation by giving the output value a name using a letter (such as y), then rearrange the equation to make x the subject.

Coefficient bounds for functions with a positive real part are used in a rather novel way to find sharp bounds for the first six coefficients of a function which is inverse to a regular normalized ...