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5-61.

Consider the function of f(x) = . Homework Help ✎

  1. What is f(7)?

  2. What is the domain of f(x)?

  3. If g(x) = 2x + 5, what is g(3)?

  4. 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).