The differential equation of the fami...

The differential equation of the family of circles with fixed radius 5 units and centre on the line `y""=""2` is (1) `(x""""2)yprime^2=""25""""(y""""2)^2` (2) `(y""""2)yprime^2=""25""""(y""""2)^2` (3) `(y""""2)2yprime^2=""25""""(y""""2)^2` (4) `(x""""2)2yprime^2=""25""""(y""""2)^2`

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