Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Applications of Derivatives

Question:

If the rate of increase of $\frac{x^2}{2}-2 x+5$ is twice the rate of decrease of it, then x is

Options:

2

3

4

1

Correct Answer:

2

Explanation:

$\frac{dy}{dx}=x-2$  ∴  by given condition

x – 2 = –2 (x – 2) ⇒ x = 2.