$\"\"$

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The function is $\"\"$

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$\"\"$

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Let y = f(x) and solve for x in terms of y.

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$\"\"$

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$\"\"$

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$\"\"$ (Add 4x to each side)

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$\"\"$

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$\"\"$ (Divide each side by 4)

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Domain: $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Domain: $\"\"$

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$\"\"$

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Therefore Domain of f : $\"\"$

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Domain of $\"\"$