1.

What is the differential equation of a family of parabolas with the foci at the origin and axis along the X-axis?

A. 2xy + 4y(y )<sup>2</sup>-y=0
B. xy + y(y )<sup>2</sup>-y=0
C. 2xy + y(y )<sup>2</sup>-y=0
D. 2xy +2y(y )<sup>2</sup>-y=0
Answer» D. 2xy +2y(y )<sup>2</sup>-y=0


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