What is the equation of the line normal to #f(x)=9x^2 - 28x - 34 # at #x=-1#?
1 Answer
Dec 29, 2016
Explanation:
let
1) find the gradient of the normal
This is done in two parts
(i) find gradient of tangent
(ii) the normal is perpendicular to the tangent .
2) find the eqn. of normal
use
need to find