How do you find the inverse of $f (x) = x^{2} + 7$ $f(x) = x^2 +7$ ?

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Answer 1 · 2015-11-14T17:18:26

It depends on the domain A.
$f : A rightarrow mathbb{R}$

Exchange x and f(x) = y.

$x = y^2 + 7$

$x - 7 = y^2$

$±sqrt{x-7} = f^-1(x)$

How do you find the inverse of f(x) = x^2 +7f(x)=x2+7f(x) = x^2 +7?