Consider the function of f(x) =
What is f(7)?
What is the domain of f(x)?
If g(x) = 2x + 5, what is g(3)?
Now use the output of g(3) as the input for f to calculate f(g(3)) .
Substitute 7 for x.
Division by 0 is undefined. What x-value causes division by 0 for this function?
x cannot have that value.
Substitute 3 for x.
g(3) = 11, therefore calculate f(11).