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The order of a differential equation is the order of the highest derivative appearing in the equation. A differential equation is called linear if it can be written in the form.
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The order of a differential equation is the order of the highest derivative appearing in the equation. A differential equation is called linear if it can be written in the form The coefficients aj(x) and b(x) can be arbitrary functions of x, but a linear equation cannot have terms such as y3, yy , or siny.