$\"\"$

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

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Find the value $\"\"$ .

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Case(i): $\"\"$

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$\"\"$ (Original function)

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Simplify)

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$\"\"$ (Multiply)

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$\"\"$ (Multiply each side by $\"\"$ )

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$\"\"$ (Simplify)

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$\"\"$

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Case(ii): $\"\"$ .

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$\"\"$ (Original function)

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Simplify)

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$\"\"$ (Simplify)

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$\"\"$ (Multiply each side by $\"\"$ )

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Add both cases.

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$\"\"$ .

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$\"\"$ .

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Therefore, the value of $\"\"$ is $\"\"$ .

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$\"\"$

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$\"\"$ .