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If f(x) = x^2 + 4 is a function defined ...

If `f(x) = x^2 + 4` is a function defined on `f : R rarr [ 4, oo )`, then its inverse function, defined as `f^-1 (x)`, is:

A

`x^3+4`

B

`1/(x^2+4)`

C

`sqrt(x-4)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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