$\"\"$

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The function is $\"f$

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$\"L$ (The original function)

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$\"L$ ( $\"f$ )

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$\"L$ (Take out $\"x$ in the denominator) \ \

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$\"L$ (Simplify)

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$\"L$ (Cancel common term)

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$\"L$ (Proparty of limits)

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$\"L$ (Simplify)

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$\"L$ (Simplify)

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$\"\"$

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$\"K$ (The original function)

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$\"K$ ( $\"f$ )

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$\"K$ (Take out $\"x$ in the denominator) \ \

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$\"K$ (Simplify)

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$\"K$ (Cancel common term)

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$\"L$ (Proparty of limits)

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$\"K$ (Simplify)

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$\"K$ (Simplify)

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$\"\"$

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Therefore $\"italic$

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L = K = 6.