$\"\"$

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(a)

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The function is $\"\"$ .

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$\"\"$ .

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

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$\"\"$

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Slope of the tangent is derivative of the function at the given point.

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$\"\"$

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$\"\"$ .

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Point-slope form of line equation : $\"\"$ .

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

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$\"\"$

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Tangent line is $\"\"$ .

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$\"\"$

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(b)

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The function is $\"\"$ .

\

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

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$\"\"$

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Slope of the tangent is derivative of the function at the given point.

\

$\"\"$

\

$\"\"$ .

\

Point-slope form of line equation : $\"\"$ .

\

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

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$\"\"$

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Tangent line is $\"\"$ .

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$\"\"$

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(a) Tangent line is $\"\"$ .

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(b) Tangent line is $\"\"$ .