CBSE 2025 · Region 6 · Set 1 · Q8 · 1 mark
If $\displaystyle \mathrm{y}=\mathrm{a} \cos (\log \mathrm{x})+\mathrm{b} \sin (\log \mathrm{x})$, then $\displaystyle \mathrm{x}^{2} \mathrm{y}_{2}+\mathrm{xy}_{1}$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle -\mathrm{y}$
Continuity and DifferentiabilitySecond Order DerivativeApplymcqmedium
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CBSE Class 12 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.