Problem Statement: CE Board May 1996
What is the differential equation of the family of parabolas having their vertices at the origin and their foci on the x-axis?
- A. 2xdy – ydx = 0
- B. xdy + ydx = 0
- C. 2ydx – xdy = 0
- D. dy/dx – x = 0
Problem Answer:
The differential equation of the family of parabolas is 2xdy – ydx = 0
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