Differential EquationHard
Question
The differential equation for the family of curves x2 + y2 - 2ay =0, where a is an arbitrary constant is -
Options
A.(x2 - y2 ) y′ = 2xy
B.2(x2 + y2) y′ = xy
C.2(x2 - y2) y′ = xy
D.(x2 + y2) y′ = 2xy
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