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    IBMediumFunctions10–12

    What is the inverse of f(x)=x−32f(x) = \frac{x - 3}{2}?

    Qual é a inversa de f(x)=x−32f(x) = \frac{x - 3}{2}?

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    Solution

    y=x−32⇒2y=x−3⇒x=2y+3y = \frac{x - 3}{2} \Rightarrow 2y = x - 3 \Rightarrow x = 2y + 3. So f−1(x)=2x+3f^{-1}(x) = 2x + 3