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(a) Consider the equation y + p(t) . y + q(t) . y =0. Assume that one is given one nonzero solution of this ODE,
(a) Consider the equation y" + p(t) . y + q(t) . y =0. Assume that one is given one nonzero solution of this ODE, say y = y1 (t), and the value of the Wronskian Wy1, y2] (t) at some point to for some other independent solution y2(t). Show how to derive a first-order differential equation for y2(t) by using Abel's theorem. (b) Consider the equation y" - 2t-2 - y = 0. Explain why this equation has a fundamental pair of solutions defined for all t > 0. Note that y1 (t) = t is a solution. If y2 (t) is another solution for which W[y1, y2] (1) = 1, use part (a) to find all possibilities for what y2 (t) could be. (c) Let p(t), q(t) be functions continuous for all t. If the Wronskian of any two solutions of the differential equation y" + p(t) . y + q(t). y=0 is constant, what does this imply about the coefficients p(t), q(t)? Prove your
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