\"\"

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The functions are \"\", and \"\".

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Consider \"\". \ \

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Apply formula : \"\".

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\"\"

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Apply formula : \"\".

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\"\"

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\"\"                                (Since \"\")

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\"\"                                   (Since \"\")

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Thus, the functions \"\" and \"\" are same. \ \

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\"\"

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The functions \"\" and \"\" are same.