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