-4x+y+(x+4y)y'=0 give value for k in which differential eqn is exact 10x^19*y^2+kx^20*y+(x+y)*x^20 dy/dx =0 dy/dx=2x^2-3x-2+(2/x)*y dy/dx=(6-(x+3)y)/x+2
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Originally Posted by samdmansam -4x+y+(x+4y)y'=0 give value for k in which differential eqn is exact 10x^19*y^2+kx^20*y+(x+y)*x^20 dy/dx =0 dy/dx=2x^2-3x-2+(2/x)*y dy/dx=(6-(x+3)y)/x+2 so we need our integration factor integratin we get
Last edited by TheEmptySet; Apr 10th 2008 at 11:00 PM.
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