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Nonlinear Functions

SAT Math· difficulty 4/5

If ff has an inverse and f(2)=7f(2) = 7, what is f(f−1(7))f(f^{-1}(7))?

  • A

    77

    check_circle
  • B

    00

  • C

    1414

  • D

    22

Explanation

f(f−1(x))=xf(f^{-1}(x)) = x, so f(f−1(7))=7f(f^{-1}(7)) = 7.

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