$\"\"$

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The functions are $\"\"$ and $\"\"$ .

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The function is $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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Find $\"\"$ .

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

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$\"\"$

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The function is $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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Find $\"\"$ .

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Substitute $\"\"$ in the above function.

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$\"\"$

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$\"\"$

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(a)

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Observe the graph of $\"\"$ and $\"\"$ : $\"\"$ and $\"\"$ .

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Find $\"\"$ and $\"\"$ .

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Slope of a tangent line $\"\"$ and $\"\"$ : $\"\"$ .

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Draw a tangent line on the graph of the function $\"\"$ .

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Consider two points on the tangent line $\"\"$ and $\"\"$ .

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Slope of a tangent line $\"\"$ and $\"\"$ : $\"\"$ .

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Therefore $\"\"$ .

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Draw a tangent line on the graph of the function $\"\"$ .

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Consider two points on the tangent line $\"\"$ and $\"\"$ .

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Slope of a tangent line $\"\"$ and $\"\"$ : $\"\"$ .

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Therefore $\"\"$ .

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Substitute $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ in equation $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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(b)

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Observe the graph of $\"\"$ and $\"\"$ : $\"\"$ and $\"\"$ .

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Find $\"\"$ and $\"\"$ .

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Draw a tangent line on the graph of the function $\"\"$ .

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Consider two points on the tangent line $\"\"$ and $\"\"$ .

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Slope of a tangent line $\"\"$ and $\"\"$ : $\"\"$ .

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Therefore $\"\"$ .

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Draw a tangent line on the graph of the function $\"\"$ .

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Consider two points on the tangent line $\"\"$ and $\"\"$ .

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Slope of a tangent line $\"\"$ and $\"\"$ : $\"\"$ .

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Therefore $\"\"$ .

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Substitute $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ in the equation $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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(a) $\"\"$ .

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(b) $\"\"$ .