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Differential Equations

RS Aggarwal

CBSE

Grade 12

Question:

Integrating factor of differential equation $\dfrac{dy}{dx} + y = \cos x$ is:
(a) $e^x$
(b) $e^{-x}$
(c) $x$
(d) $\log x$

Step-by-Step Solution

Key Concept: IF = e^{\int 1 dx} = e^x.

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Correct Answer: $e^x$

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