diff-equation

Question: The differential equation of all circles which passes through the origin and whose centre lies on y-axis, is



1) $({{x}^{2}}-{{y}^{2}})\frac{dy}{dx}-2xy=0$
2) $({{x}^{2}}-{{y}^{2}})\frac{dy}{dx}+2xy=0$
3) $({{x}^{2}}-{{y}^{2}})\frac{dy}{dx}-xy=0$
4) $({{x}^{2}}-{{y}^{2}})\frac{dy}{dx}+xy=0$
Solution: Explanation: No Explanation
Formation of differential equations

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