Q. The second order differential equation is
A) $y^{'2} + x = y^{2}$
B) $y^{'}y^{''} + y = \sin x$
C) $y^{'''} + y^{''} + y = 0$
D) $y^{'} = y$
Explanation
(b)
$\because$ The order of the differential equation is the order of highest derivative in the differential equation.
$\therefore$ The second order differential equation is in option (b) $ie$,
$y^{'}y^{''} + y = \sin x$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.