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Let R(+) be the set of all non-negative ...

Let `R_(+)` be the set of all non-negative real numbers. Show that the function `f: R_(+) to [4,oo]` defind by `f(x) = x^(2)+4` Is invertible and write the inverse of f.

Text Solution

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