$\"\"$

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The function is $\"\"$ .

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Find $\"\"$ :

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Equate the function to $\"\"$ .

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$\"\"$ .

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Assume $\"\"$ , then $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ and $\"\"$ .

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$\"\"$ since $\"\"$ cannot be equals to $\"\"$ .

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$\"\"$ .

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Therefore $\"\"$ , then $\"\"$ .

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$\"\"$

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$\"\"$ .