What is the equation of the line normal to #f(x)=(5+4x)^2 # at #x=7#?
1 Answer
Apr 15, 2018
Explanation:
A normal line is a line that is perpendicular to the tangent line of a graph at the point of tangency.
Let's find
When
With this in mind, let's find the point of tangency.
The normal line will have the slope of
We use the slope-intercept form: