$\"\"$

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The function is $\"\"$ and $\"\"$ .

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$\"\"$

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Divide the numerator and denominator by $\"\"$ .

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$\"\"$

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$\"\"$

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Case 1 : $\"\"$ .

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If $\"\"$ then $\"\"$

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As $\"\"$ then $\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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Case 2 : $\"\"$ .

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$\"\"$ .

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$\"\"$

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Case 3: $\"\"$ .

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If $\"\"$ then $\"\"$ .

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As $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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If $\"\"$ then $\"\"$ .

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If $\"\"$ then $\"\"$ .

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If $\"\"$ then $\"\"$ .