$\"\"$

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Let $\"\"$ .

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Substitute $\"\"$ in above equation

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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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$\"\"$

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Substitute $\"\"$ and $\"\"$ in above equation

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is $\"\"$ .

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