In Try This 2 you may have noticed a composition of functions that are equations can be determined using substitution. For the functions f(x) = 3x + 1 and
and
You may have also noticed that (f(g(x)) is not the same as (g(f(x)). Watch Composition of Functions to see the difference.
Read “Example 1” on pages 501 and 502 of the textbook. Pay attention to the two methods used to evaluate a composite function.