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Question

Engineering Mathematics Question on Differential Equations

If the complete solution of the ordinary differential equation
d2ydx2+adydx+βy=0  is  y=c1ex+c2e3x,\frac{d^2y}{dx^2}+a\frac{dy}{dx}+\beta y=0\;is\;y=c_1e^{-x}+c_2e^{-3x},
Then the values of \propto and B are:

A

β=4,=3\beta=4,\propto=3

B

β=3,=4\beta=3,\propto=4

C

β=3,=3\beta=3,\propto=3

D

β=4,=4\beta=4,\propto=4

Answer

β=3,=4\beta=3,\propto=4

Explanation

Solution

The correct option is(B):