The function f is defined by f x = x 3 + 15 . What is the value of f

Question

The function f is defined by f x = x 3 + 15 . What is the value of f 2 ?

Accepted Answer

Choice C is correct. The value of f 2 is the value of f x when x = 2 . Substituting 2 for x in the given function yields f 2 = 2 3 + 15 , or f 2 = 8 + 15 , which is equivalent to f 2 = 23 . Therefore, the value of f 2 is 23 . Choice A is incorrect and may result from conceptual or calculation errors. Choice B is incorrect. This is the value of f 2 when f x = x 3 + 15 , rather than f x = x 3 + 15 . Choice D is incorrect and may result from conceptual or calculation errors.

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