$\"\"$

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

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$\"\"$

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Domain of $\"\"$ is $\"\"$

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So exclude $\"\"$ from the domain of $\"\"$ .

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Domain of $\"\"$ is $\"\"$

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So $\"\"$ .

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To determine additional values of $\"\"$ to exclude, solve the equation $\"\"$ .

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$\"\"$

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$\"\"$

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Also exclude $\"\"$ from the domain of $\"\"$ .

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

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$\"\"$

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The function $\"\"$

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Check:

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

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$\"\"$ is not defined.

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So $\"\"$ is not defined.

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

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$\"\"$

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$\"\"$

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$\"\"$ is not defined.

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$\"\"$

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