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anonymous
 4 years ago
let f(x)= 1/x+9
what is f^1(x)=?
anonymous
 4 years ago
let f(x)= 1/x+9 what is f^1(x)=?

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nenadmatematika
 4 years ago
Best ResponseYou've already chosen the best response.0oh you're true Mertsj...it's the inverse function :D

cristiann
 4 years ago
Best ResponseYou've already chosen the best response.0This question is either tricky or just plain sloppy ... First: it's not clear the form of the function \[f_{1}(x)=\frac{1}x+9\] or \[f_{2}(x)=\frac{1}{x+9}\] Then: no matter which function, you still have problems, because of the domain and codomain of the functions: For f1: \[x \neq 0, y \neq 9\] so only if the function is in the form \[f_{1}:\mathbb{R}^{*}\rightarrow \mathbb{R} \setminus (9) \] it is bijective (onetoone/injective and onto/surjective) For the second function, you have the same type of problem, with \[x \neq 9, y \neq 0\] Only now you may talk about the expression of the inverse.
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