exo7 4112

1

\(xy'+y = xy^3\).

2

\(2xy'+y = \frac{2x^2}{y^3}\).

3

\(\sqrt x y' - y + (x+2\sqrt x)\sqrt y = 0\).

4

\(xy'+y = (xy)^{3/2}\).

5

\(x^3y' = y(3x^2+y^2)\).