Question 1029529
If you are talking about any cubic polynomial of the form *[tex \large y = ax^3 + bx^2 + cx + d], then none of those are true.


A) If by "turning point" you mean a point where the function's derivative (in x) changes sign, this need not be true. For example, *[tex \large y = x^3] has no turning points.

B) Not true, *[tex \large y = x^3] has no local minima or maxima.

C) Not true, *[tex \large y = x^3] is weakly increasing over the entire real line.