In this video we see how to find the outside function of any give composite function. In this type of questions, we are provided with the value of f(g(x)) along with the value of g(x) and we are asked to find f(x). To do so, we will have to first find the inverse function of g(x) and use the property that g(g^(-1)(x)) is just simply x again. Hope this video was helpful!
You can get some practice by attempting the problem on your own before watching the rest of the video.
Feel free to comment a question you would like me to solve below.