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 ?
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The function f is defined by f x = x 2 + x + 71 .
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
The correct answer is . It’s given that the function is defined by . Substituting for in function yields , which is equivalent to , or . Therefore, the value of is .
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