The interval in which f(x)=-2x^3-9x^2-12x+1 is increasing, is: Option 1: (-∞,-2) Option 2: (-1,∞) Option 3: (-2,-1) Option 4: (-∞,-2)(-1,∞)

The answer is '(-2,-1)'. View full solution:

CUET Mathematics - The interval in which f(x)=-2x^3-9x^2-12x+1 is increasing, is: | PYQs + Solutions

CUET Mathematics 2026 22nd May Shift 1

Calculus

Easy

applied

$(-\infty,-2)$

$(-1,\infty)$

$(-2,-1)$

$(-\infty,-2)\cup(-1,\infty)$

✅ Correct Option: 3

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