For the function f defined above, what is the value of ?
9
12
18
36
Choice C is correct. The value of is found by evaluating the expression
when
. Substituting 2 for x in the given equation yields
. Simplifying
in the equation results in
. Evaluating the right-hand side of the equation yields
. Therefore, the value of
is 18.
Choice A is incorrect and may result from evaluating the expression as . Choice B is incorrect and may result from evaluating the expression as
. Choice D is incorrect and may result from evaluating the expression as
.