CUET Mathematics 2026 31st May Shift 2 PYQs

The interval on which the function $f(x) = x^3 + 2x^2 - 1$ is decreasing, is

For the function, $f(x) = \frac{-3}{4}x^4 - 8x^3 - \frac{45}{2}x^2 - 350$, which of the following statements are correct?

(A) $x = -3$ and $x = -5$ are the only critical points of the given function.

(B) $x = -3$ is a point of local minimum.

(C) The local minimum value at $x = -3$ is 23.1.

(D) $x = -5$ is a point of local maximum.

Choose the correct answer from the options given below:

The function $f(x) = 6(2x^4 - x^2)$ is strictly increasing in