CBSE 2023 · Region 1 · Set 1 · Q16 · 1 mark
If $\displaystyle \mathrm{f}(\mathrm{x})=\mathrm{a}(\mathrm{x}-\cos \mathrm{x})$ is strictly decreasing in $\displaystyle \mathbb{R}$, then ' a ' belongs to
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle (-\infty, 0)$
Application of DerivativesIncreasing and Decreasing FunctionsAnalysemcqmedium
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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.