Question

The order of the differential equation whose solution is :
$y=a\cos x+b\sin x+c{e}^{-x}$ is :

• A. 3
• B. 2
• C. 1
• D. none of these.

Answer 1

Answer: (A)

Given : $y=a\cos x+b\sin x+c{e}^{-x}$
This equation has three parameters.
$\therefore$ The order of differential equation is 3.