The function f is defined by f x = x 3 + 9 . What is the value of f

Question

The function f is defined by f x = x 3 + 9 . What is the value of f 2 ?

Accepted Answer

Choice C is correct. It's given that f x = x 3 + 9 . Substituting 2 for x in this equation yields f 2 = 2 3 + 9 . This is equivalent to f 2 = 8 + 9 , or f 2 = 17 . Choice A is incorrect. This is the value of 2 + 3 + 9 , not 2 3 + 9 . Choice B is incorrect. This is the value of 2 3 + 9 , not 2 3 + 9 . Choice D is incorrect. This is the value of 3 2 + 9 , not 2 3 + 9 .

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