The equation is and the point is
. \ \
The slope of the tangent line is equal to the derivative of the function at . \ \
.
Apply logarithm product rule: . \ \
Apply derivative on each side with respect to . \ \
.
\ \
Slope at the point is
. \ \
Substitute in
. \ \
. \ \
Point-slope form of line equation . \ \
Substitute point and slope
in the above equation. \ \
. \ \
Tangent line equation is .
\ \
Tangent line equation is .