Q. The order and degree of the differential equation $\left( 1 + \left( \frac{dy}{dx} \right)^{2} \right)^{\frac{3}{4}} = \left( \frac{d^{2}y}{dx^{2}} \right)^{\frac{1}{3}}$is

A) $(2,4)$
B) $(2,3)$
C) $(6,4)$
D) $(6,9)$
Explanation

(a)
Given differential equation can be rewritten as
$\left\lbrack 1 + \left( \frac{dy}{dx} \right)^{2} \right\rbrack^{\frac{3}{4} \times 12} = \left( \frac{d^{2}y}{dx^{2}} \right)^{\frac{1}{3} \times 12}$
$\Rightarrow$ $\left\lbrack 1 + \left( \frac{dy}{dx} \right)^{2} \right\rbrack^{9} = \left( \frac{d^{2}y}{dx^{2}} \right)^{4}$
Here, we see that order of highest derivative is 2 and degree is 4.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.