Question

The order of the differential equation of all parabolas whose axis of symmetry along $x$-axis is

• A. $2$
  
• B. $3$
  
• C. $1$
  
• D. None of these

Answer 1

The correct option is A $2$


Consider an equation of parabola whose axis of symmetry is
along $x$ axis.
$y^2=4a(x-b)$
As there are two parameter,
Therefore, the order of the differential equation of all parabolas
whose axis of symmetry is along x-axis is $2$.