The order of the differential equation whose solution is y=a x+b … - Vidyadip

Question

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

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Answer

(a): $y=a \cos x+b \sin x+c e^{-x}$
It is a third order differential equation, as it contains three arbitrary constants.

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