The ** general solution** to a differential equation must satisfy both the homogeneous and non-homogeneous equations. It is the nature of the homogeneous solution that the equation gives a zero value. The general solution of a differential equation is also called the

**primitive**. The general solution or primitive of a differential equation of order n always contains exactly n essential arbitrary constants.

A ** particular solution** differential equation contains two or more independent variables. The derivatives occurring in the equation are partial derivatives. A differential equation is a solution of a differential equation containing no arbitrary constants.

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