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

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The domain of $\"\"$ is $\"\"$ .

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

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The 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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$\"\"$

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$\"\"$ .

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Since the domain $\"\"$ is all real numbers, the 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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$\"\"$

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

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