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The order of the differential equation whose solution is given by y=c1x+c2+c3elogx+c4cosx+c5, where c1, c2, c3, c4 and c5 are arbitrary constants, is

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Important Questions on Differential Equations

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The differential equation of all circles with fixed centre α, β is
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The order of the differential equation of ellipse whose major and minor axes are along x-axis and y-axis respectively, is
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The differential equation of the family of curves v=Ar+B, where A and B are arbitrary constants, is