Question the-fu
The function is defined by . What is the value of when is equal to ?
The function p is defined by p n = 7 n 3 . What is the
Medium-difficulty · SAT Math · Nonlinear Functions — Function composition and evaluation. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice A is correct. It's given that . Substituting for in this equation yields . Dividing each side of this equation by yields . Taking the cube root of each side of this equation yields . Therefore, when is equal to , the value of is .
Choice B is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect and may result from conceptual or calculation errors.
Choice D is incorrect and may result from conceptual or calculation errors.
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