CBSE 2025 · Region 1 · Set 2 · Q12 · 1 mark
The integrating factor of the differential equation $\displaystyle \frac{\mathrm{dy}}{\mathrm{dx}}+\mathrm{y}=\frac{1+\mathrm{y}}{x}$ is
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle \frac{\mathrm{e}^{x}}{x}$
Differential EquationsMethods of Solving First Order, First Degree Differential EquationsApplymcqmedium
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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.