$\"\"$

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The function is $\"\"$ .

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Let the point of tangency be $\"\"$ .

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

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$\"\"$

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

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$\"\"$

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The two points on the tangent line as $\"\"$ and $\"\"$ .

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

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$\"\"$

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

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Equate the two slope of the tangent line.

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$\"\"$

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$\"\"$ or $\"\"$ .

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$\"\"$

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

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Point of tangency is $\"\"$ .

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If $\"\"$ then slope of the tangent line is $\"\"$ .

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

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Substitute $\"\"$ and point $\"\"$ in point slope form.

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$\"\"$

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$\"\"$

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Equation of tangent line is $\"\"$ .

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

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Point of tangency is $\"\"$ .

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If $\"\"$ then slope of the tangent line is $\"\"$ .

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

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Substitute $\"\"$ and point $\"\"$ in point slope form.

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$\"\"$

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$\"\"$

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Equation of tangent line is $\"\"$ .

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$\"\"$

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Equation of tangent lines are $\"\"$ and $\"\"$ .