You are correct. The slope is always positive.
see the graph at
http://www.wolframalpha.com/input/?i=x%5E3%2Bx
Determine the point(s) if any at which the graph of the function has a horizontal tangent line.
y=x^3+x
I graphed this function out and it looks like there isn't any horizontal tangents. Am I correct or am I forgeting something? I tried finding the derivitave of the function which ended up being 3x^2+1 but that equation will never equal to zero
1 answer
1 answer