SOLUTION: Find the slope of the line normal to the curve y = 4x²-20x + 5 at x = 4.

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Question 1111275: Find the slope of the line normal to the curve y = 4x²-20x + 5 at x = 4.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
m=8x-20 at x=4.


m=32-20

m=12

slope needed for perpendicular is -1%2F12.

Answer by ikleyn(52887) About Me  (Show Source):
You can put this solution on YOUR website!
.
The value  m = 12  that  @josgaritmetic  determined in his solution,  is the slope of the  TANGENT  line.


The slope of the  PERPENDICULAR/ (normal) line is  -1%2F12,  of course.