Question

The differential equation of all parabolas whose axis is $y-axis$ is

• A. $x \frac{d^{2} y}{dx^{2} } - \frac{dy}{dx} = 0$
• B. $x \frac{d^{2} y}{dx^{2} } + \frac{dy}{dx} = 0$
• C. $\frac{d^{2} y}{dx^{2} } - y = 0$
• D. $\frac{d^{2} y}{dx^{2} } - \frac{dy}{dx} = 0$

Answer 1

Answer: (A)

$x \frac{d^{2} y}{dx^{2} } - \frac{dy}{dx} = 0$

Answer 2

Answer (a) $x \frac{d^{2} y}{dx^{2} } - \frac{dy}{dx} = 0$