The function $f(x)= -2x^3-9x^2-12x+5$ is

CUET Preparation Today

Start Free Mocks

Home Questions GNADSKVFTN

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Relations and Functions

Question:

The function $f(x)= -2x^3-9x^2-12x+5$ is :

Options:

increasing in (-2, -1) and decreasing in (-∞,-2) ∪ (-1, ∞)

increasing in (-∞, -2) ∪ (-1, ∞) and decreasing in (-2, -1)

increasing in (0, ∞) and decreasing in (-∞, 0)

decreasing in (0, ∞) and decreasing in (-∞, 0)

Correct Answer:

increasing in (-2, -1) and decreasing in (-∞,-2) ∪ (-1, ∞)