W wildbill New member Joined Feb 1, 2006 Messages 4 Feb 9, 2006 #1 Find all values of x (if any) where the tangent line to the graph of the function is horizontal. y = x^3 + 2x^2 - 224x + 28 a. 28/3 , -8 b. -28/3 , 28/3 , 8 c. - 28/3 , 8 d. 8 I am confused, anyone can you help
Find all values of x (if any) where the tangent line to the graph of the function is horizontal. y = x^3 + 2x^2 - 224x + 28 a. 28/3 , -8 b. -28/3 , 28/3 , 8 c. - 28/3 , 8 d. 8 I am confused, anyone can you help
tkhunny Moderator Staff member Joined Apr 12, 2005 Messages 11,325 Feb 9, 2006 #2 Have you tried the merits of the first derivative?
