Step 1:

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a) Graph:

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The function is $\"\"$ and the point is $\"\"$ .

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$\"\"$

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Apply derivative on both sides.

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$\"\"$ (Since $\"\"$ and $\"\"$ )

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$\"\"$

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Multiply and divide both numerator and denominator with $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Find the derivative at the point $\"\"$ .

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

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$\"\"$ .

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Find the tangent line equation using the formula $\"\"$

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$\"\"$

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Multiply both sides by 2.

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$\"\"$

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$\"\"$

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$\"\"$

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