Question

The third order differential equation is ______ 

विकल्प

• y^'2 + x = y² 

• y'y" + y = sin x

• y"' + y" + y = 0

• (y')³ = y

Answer 1

The third order differential equation is y"' + y" + y = 0.

Explanation:

In option (y"' + y" + y = 0), y"' is the highest order derivative, of order 3.

∴ option (y"' + y" + y = 0) is the correct answer.