If $p$ and $q$ are the order and degree of the differential equation $y \frac{d y}{d x}+x^3 \frac{d^2 y}{d x^2}+x y=\cos x$, then
Answer & explanation
Correct answer: option 3
The given differential equation is of order 2 and degree 1 .
∴ $p=2$ and $q=1 \Rightarrow p>q$