Question the-fu
2.1 Nonlinear Functions - Function composition and evaluation
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The function is defined by . What is the value of ?
A.
B.
C.
D.
The function g is defined by g x = 8 x + 1 . What is
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 C is correct. It’s given that the function is defined by . Substituting for in the given function yields , which is equivalent to , or . Therefore, the value of is .
Choice A is incorrect and may result from conceptual or calculation errors.
Choice B is incorrect and may result from conceptual or calculation errors.
Choice D is incorrect. This is the value of , not .
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