Find the implied domain off(x)= (square root x-5) + (square root 15 -x)

or (x-5) ^(1/2) + (15 -x)^(1/2)

Sorry I don't know how to use the square root sign here.

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- Feb 6th 2009, 09:41 PMdelicate_tearsImplied domain
Find the implied domain of

**f(x)= (square root x-5) + (square root 15 -x)**

or (x-5) ^(1/2) + (15 -x)^(1/2)

Sorry I don't know how to use the square root sign here. - Feb 7th 2009, 01:11 AMrunning-gag
Hi

$\displaystyle f(x) = \sqrt{x-5} + \sqrt{15-x}$

You can take the square root of only positive expressions

You must have both $\displaystyle x-5 \geq 0$ and $\displaystyle 15-x \geq 0$