Question

Integrating factor of different equation $\frac{dy}{dx}+y=3$ is

• A. x
• B. e
• C. $e^x$
• D. log x

Answer 1

The correct option is C $e^x$

$\frac{dy}{dx}+y=3$

Comparing the above equation with $\frac{dy}{dx}+Py=Q$, we have

$P=1$

Therefore,

Integrating factor $=e^{\int Pdx}=e^{\int 1dx}=e^x$