Free interactive math game: Composite Function — f(g(x)). Part of the Functions category on MathKite.
Taken from the generator that powers this exercise. A fresh set appears every time the page is opened, and the printable worksheet holds ten of them.
Applying one function to the result of another.
Work from the inside outwards: evaluate the inner function first, then feed its result into the outer one.
With f(x) = x + 1 and g(x) = 2x, the value of f(g(3)) is f(6) = 7.
Applying them in the wrong order. The inner function is the one written closest to the input.