Find the general real solution to the following homogeneous differential equations: (a) u + 4u = 0
Question:
(a) u" + 4u = 0
(b) u" + 6u' + 10u = 0
(c) 2u'" + 3u' - 5u = 0
(d) u"" + u = 0
(e) u"" + 13u" + 36u = 0
(f) x2 u" - xu′ + 3u = 0
(g) x3u'" + x2u" + 3xu' - 8u = 0
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