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8/17/2019 ESing.pdf
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x2 d2y
dx2 7xdy
dx + 16y = 0, Exact solution is:
C 2x
4 + C 3x4 lnx
y (x) = C 1x4 + C 2x4 ln (x)
reemplazando.
x2 d2y
dx2 7xdy
dx + 16y = 0
x2 d2
dx2
C 1x
4 + C 2x4 ln (x)
7x d
dx
C 1x
4 + C 2x4 ln (x)
+16
C 1x
4 + C 2x4 ln (x)
= x4 (12C 1 + 7C 2 + 12C 2 lnx)7x4 (4C 1 + C 2 + 4C 2 lnx)+16x
4C 1+16x4C 2 lnx =
0Siendo C 1 y C2 cualquier constante que pertenece a los reales.//////////////////////////////////////////dydx sin(5x) = 0, Exact solution is:
C 5
1
5 cos 5x
1
8/17/2019 ESing.pdf
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