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