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Second Order Linear Differential Equations

2008, 2016 Zachary S Tseng B 1 1 Second Order Linear Differential Equations Second Order Linear Equations with constant coefficients; Fundamental solutions; Wronskian; Existence and Uniqueness of solutions; the characteristic equation; solutions of homogeneous Linear Equations ; reduction of Order ; Euler Equations In this chapter we will study ordinary Differential Equations of the standard form below, known as the Second Order Linear Equations : y + p(t) y + q(t) y = g(t). Homogeneous Equations : If g(t) = 0, then the equation above becomes y + p(t) y + q(t) y = 0. It is called a homogeneous equation. Otherwise, the equation is nonhomogeneous (or inhomogeneous). Trivial Solution: For the homogeneous equation above, note that the function y(t) = 0 always satisfies the given equation, regardless what p(t) and q(t) are.

Second Order Linear Homogeneous Differential Equations with Constant Coefficients For the most part, we will only learn how to solve second order linear equation with constant coefficients (that is, when p(t) and q(t) are constants). Since a homogeneous equation is easier to …

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