Solve the following differential equation: x dy +(y – x 3) dx = 0
Given: differential equation x dy +(y – x 3) dx = 0
To find: the value given differential equation
given: x dy +(y – x 3) dx = 0
Dividing throughout by dx,
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Dividing throughout by x we get,
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This is of the of the standard form, i.e.,
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Where
and Q=x2
And we know the integrating factor is
IF=e∫P dx
Substituting the value of P in the IF, we get
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But we know integration of
is log x, substituting this in the above equation, we get
IF=elog( x)
But elog x=x, so he above equation becomes,
IF=x
So the general solution of a differential equation is
y(IF)=∫(Q×I.F)dx+C
Substituting the corresponding values in the above equation, we get
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On integrating, we get
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Or
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Hence this is the solution of the given differential equation
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