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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 5 · Set 1 · Q9
The interval in which the function f (x)=2 x^3+9 x^2+12 x-1 is decreasing, is
The interval in which the function $\displaystyle \mathrm{f}(x)=2 x^{3}+9 x^{2}+12 x-1$ is decreasing, is
Official answer
(B)
$\displaystyle (-2,-1)$
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CBSE Class 12 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.