1.

The equation of the curve satisfying thedifferential equation `y((dy)/(dx))^2+(x-y)(dy)/(dx)-x=0`can be a(a) circle (b) Straight line(c) Parabola (d)EllipseA. CircleB. Straight lineC. ParabolaD. Ellipse

Answer» Correct Answer - A::B
`y((dy)/(dx))^(2)+(x-y)(dy)/(dx) -x=0`
or `(dy)/(dx) = ((y-x)+-sqrt((x-y)^(2)+4xy))/(2y)`
So, `(dy)/(dx)=1` which gives straight line.
or `(dy)/(dx)=1` which gives straight line
or `(dy)/(dx)=-x/y` which gives circle.


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