A differential equation is linear if it can be written in the form a(x)y'' + b(x)y' + c(x)y = f(x), where a(x), b(x), c(x), and f(x) are functions of the independent variable x.
A differential equation is linear if it can be written in the form a(x)y'' + b(x)y' + c(x)y = f(x), where a(x), b(x), c(x), and f(x) are functions of the independent variable x.