$\"\"$

The function is $\"\"$ .

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

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

Consider $\"\"$ .

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

$\"\"$

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

$\"\"$

Substitute $\"\"$ in the function.

$\"\"$

$\"\"$ .

$\"\"$

The tangent line and function are equal at a particular point.

Hence equate the function and the tangent line equation.

$\"\"$

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

$\"\"$

$\"\"$ .

$\"\"$

$\"\"$ .