a) Show that C has two tangents at the point (3,0) and find their equation.
b) Find the point on C where the tangent is horizontal or vertical.
c) Determine where the curve is concave upward or downward?
I was able to do part a and b, but I'm stuck on part c. How do you find the second derivative of this curve?
Originally Posted by cityismine
That's the formula I'm having trouble understanding. But I googled some examples and I think I get it now. It's the derivative of the 1st derivative divided by the denominator of the first derivative, right?
Originally Posted by cityismine and edited (in red) by Mr F