(h) Use two of the functions f(x), g(x) and h(x) to find the composite function which is equal to 2^​(x+​1) – 1.

The functions that are given in the question.

The picture below shows the three functions that are given in the question, based on which they are asking:

Use two of the functions f(x), g(x) and h(x) to find the composite function which is equal to 2^(x+1) – 1.

It would be great if there was a detailed explanation as to how you got the answer too. Thanks!