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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 all real numbers. 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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Subtract $\"\"$ from each side.

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$\"\"$

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$\"\"$ .

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Square of any real number is must be positive

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Since $\"\"$ will never be less than $\"\"$ , there are no $\"\"$ -values in the domain of $\"\"$ such that $\"\"$ . This means there is no restriction for the domain of $\"\"$ .

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The domain of $\"\"$ is all real numbers.

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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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$\"\"$

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$\"\"$

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Therefore, $\"\"$ .

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$\"\"$ .