f(x) = ax + b with a > 0, and f(f(x)) = 4x + 9. What is a + b? | StemPy Lab

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f(x) = ax + b with a > 0, and f(f(x)) = 4x + 9. What is a + b? | StemPy Lab

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f(x) = ax + b with a > 0, and f(f(x)) = 4x + 9. What is a + b?

MathematicsHardHigh School (11–12)Functions and Calculus › Composite and Inverse Functions Functions and Calculus › Relations and Functions

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$f(x) = ax + b$ with $a > 0$ , and $f(f(x)) = 4x + 9$ . What is $a + b$ ?

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