$\"\"$

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The function $\"\"$ .

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Graph :

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Draw a coordinate plane.

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Graph the function $\"\"$ .

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$\"\"$

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Graphically the value of $\"\"$ .

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$\"\"$

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To find the exact value of $\"\"$ , use partial fraction decomposition.

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$\"\"$

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$\"\"$ .

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$\"\"$

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Consider $\"\"$ .

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Partial fraction decomposition.

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$\"\"$

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Compare coefficients of $\"\"$ terms on both sides.

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$\"\"$

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Compare constant terms on both sides.

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$\"\"$

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

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$\"\"$

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$\"\"$ .

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

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Substitute $\"\"$ and $\"\"$ in equation (1).

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .