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Let R+ be the set of all non negative re...

Let R+ be the set of all non negative real numbers. Show that the function `f: R_(+) to [4, infty]` given by `f(x) = x^2 + 4` is invertible and write inverse of 'f'.

Text Solution

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The correct Answer is:
`f^(-1)(y) = sqrt(y-4)`
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