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Mathematics 4 Online
OpenStudy (anonymous):

For f(x) = x + 10 find (fxf^-1)(5)

OpenStudy (ash2326):

We have \[f(x)=x+10\] We know that \[ f(f^{-1} {x})=x\] so \[f(f^{-1} (5))=5\]

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