$\"\"$

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Observe the graph of $\"\"$ .

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(a)

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The values of $\"\"$ .

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Consider graph simplify the function $\"\"$ .

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Rewrite the function.

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$\"\"$

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Differential formula : $\"\"$ .

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$\"\"$

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Find $\"\"$ .

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The slope of the line is the first derivative of the function at $\"\"$ .

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Slope of the tangent line is $\"\"$ .

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Therefore $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in the differential formula.

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$\"\"$

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$\"\"$ .

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$\"\"$

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(b)

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The values of $\"\"$ .

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Rewrite the function.

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$\"\"$ .

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Differential formula : $\"\"$ .

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$\"\"$ .

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Substitute $\"\"$ and $\"\"$ in the differential formula.

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$\"\"$

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$\"\"$ .

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$\"\"$

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(a) $\"\"$ .

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(b) $\"\"$ .