Question:medium
The function \( f(x) = 2x^3 - 15x^2 + 36x + 6 \) is strictly decreasing in the interval:
The function \( f(x) = 2x^3 - 15x^2 + 36x + 6 \) is strictly decreasing in the interval:
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To quickly find where a quadratic $(x-a)(x-b) < 0$ (assuming $a < b$), remember it's always the region "between" the roots. For $> 0$, it's the region "outside" the roots.
Updated On: May 6, 2026
- \( (2, 3) \)
- \( (-\infty, 2) \)
- \( (3, 4) \)
- \( (-\infty, 3) \cup (4, \infty) \)
- \( (-\infty, 2) \cup (3, \infty) \)
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The Correct Option is A
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