Find k if the slope of one of the lines given by3x^2+4xy+ky^2=0 is three times the other
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This is NOT a Line but system of Line : in fact an ellipse !
dy/dx at any point is Slope
on differentiation we get :
6x + 4xy'+4y+ kyy'=0
y'( ky+4x) = -6x -4y
y'= -( 6x+4y)/(ky+4x)
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