What is the equation of the normal line of #f(x)=-4x-1# at #x=2#?
1 Answer
Jan 10, 2016
Explanation:
If the excercise does not clearly request the derivation use, you could also think:
is a line, then the tangent line to it is the line itself
with
and
The normal line is
with
then:
the normal line becomes: