$\"\"$

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

$\"\"$ .

Differentiate on each side with respect to $\"\"$ .

$\"\"$

Slope of the tangent is derivative of the function.

$\"\"$ . \ \

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

$\"\"$

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

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

Substitute slope $\"\"$ and the point $\"\"$ .

$\"\"$

The equation of a tangent line is $\"\"$ .