A-level Maths · Algebra and functions

Value of an inverse function

Find the inverse of a linear, rational or completed-square function and evaluate it.

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Question 1

The function ff is defined by f(x)=2x+5f(x) = 2x + 5. Find the value of f−1(12)f^{-1}(12).

You can type 4.53, 3.2e-5, 3.2 × 10^-5 or 7/3.

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