Class 12 Maths Differential Equations | What is differential equation |

**What is differential equation?**

An equation that involves a relationship between a function and one or more derivatives is called a differential equation.

* Example:* a * dy/dx + x = y A Derivative form

dy/dx = cos x

Above are the examples of differential equation since it involve a derivative form and the function in form of x and y.

__But,__

ax^{2}+bx+c=0 or x * sinx - x=1. These equations have variable x but do not include their derivatives hence these functions are not differential equation

Hyperbola equation

Hyperbola Equation is not a differential equation

Similarly y=sinx not a differential Equation

* Notation used*:

For n^{th} order

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