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Tang Derek

Apr 06, 2021

In Euclid Math Contest

Suppose that the function g satisfies g(x) = 2x âˆ’ 4 for all real numbers x and that g âˆ’1 is the inverse function of g. Suppose that the function f satisfies g(f(g âˆ’1 (x))) = 2x 2 + 16x + 26 for all real numbers x. What is the value of f(Ï€)? I got to this step: f ((x + 4)/2) = (x + 4)^2 âˆ’ 1 In answer key it says Thus, we can replace (x + 4)/2 with Ï€, which is equivalent to replacing x + 4 with 2Ï€ why can we replace x+4 with 2Ï€?

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# Tang Derek

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