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The functions are $\"\"$ and $\"\"$ .

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To find $\"\"$ , you must first be able to find $\"\"$ , which can be done for $\"\"$ . Then you must able to evaluate $\"\"$ for each of these $\"\"$ values, which can only be done when $\"\"$ . This means that we must exclude from the domain in those values for which $\"\"$ .

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$\"\"$

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Square on both sides.

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$\"\"$

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$\"\"$

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$\"\"$ .

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Therefore, $\"\"$ . Combining these restrictions, he domain of $\"\"$ is $\"\"$ .

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Find $\"\"$ .

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$\"\"$

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Replace $\"\"$ with $\"\"$ .

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$\"\"$

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Substitute $\"\"$ for $\"\"$ in $\"\"$ .

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$\"\"$

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Multiply numerator and denominator by $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Therefore, $\"\"$ for $\"\"$ .

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$\"\"$ for $\"\"$ .