CBSE 2026 · Region 2 · Set 3 · Q11 · 1 mark
If $\displaystyle x+\mathrm{y}=x \mathrm{y}$, then $\displaystyle \frac{\mathrm{dy}}{\mathrm{dx}}$ is
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \frac{1-\mathrm{y}}{x-1}$ &
Continuity and DifferentiabilityLogarithmic DifferentiationApplymcqeasy
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CBSE Class 12 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.