Find all the values of x where the graph of the function g(x)=2.25x^(4)+(36/3)x^(3)-144x^(2)+37 has a horizontal tangent line.
galactus
Mar 5, 2009, 07:43 AM
Differentiate, set to 0 and solve for x.
When you differentiate, set to 0 and solve for x, you will have a cubic with three solutions. Those solutions are where the tangent lines are horizontal.