Use the method of Example 9 and the standard integral to derive the general solution y(x) =

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Use the method of Example 9 and the standard integral


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to derive the general solution y(x) = A cos x + B sin x of the second-order differential equation y'' + y = 0. Thus its solution space has basis {cos x, sin x}.


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Differential Equations And Linear Algebra

ISBN: 9780134497181

4th Edition

Authors: C. Edwards, David Penney, David Calvis

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