xydx+√ 1-x²dy=0xydx= -sqrt(1-x^2)dy-x/sqrt(1-x^2)dx=1/y dy∫ -x/sqrt(1-x^2) dx = ∫ 1/y dysqrt(1-x^2)+c=lnyy=e^(sqrt(1-x^2)+c)y=e^c*e^(sqrt(1-x^2))y=C*e^(sqrt(1-x^2))
