Question

given that the curve x^3+ax^2+bx has no turning points show that a^2<3b

Answer 1

@ganeshie8

Answer 2

http://math.stackexchange.com/questions/963949/given-that-the-curve-x3ax2bx-has-no-turning-points-show-that-a23b

Answer 3

I appreciate your help thanks :D

Answer 4

np :) ask me if you something in that link is too brief or doesnot make sense

Answer 5

i do not understand the part when the derivative takes a constant sign it has no real roots

Answer 6

think of a parabola

Answer 7

roots of parabola are same as x intercepts, right ?