1.

The differential equation of the family of curves x2 + y2 – 2ay = 0, where a is arbitrary constant, is:(A) (x2 – y2)dy/dx = 2xy(B) 2(x2 + y2)dy/dx = xy(C) 2(x2 – y2)dy/dx = xy(D) (x2 + y2)dy/dx = 2xy

Answer» Answer is (A)


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