◦ to -
h to to -1h
, y flt.tk/2esci1en1R2-.Paracua1quierltoi1olElR2existesolucio' n del Problema de Cauchy
Tadema's es ienica .
4=0 también es sohu.io'D del problema porque es de clase 41 Ysatisface la ecuacion .
Y
Cso y
1-
Ylt, c) =
-
Hay que comprobar que F-O es solucion .
'
t -1s
OH =y2 of/01=0/1 OH
✗ It) -0
f= dt
:O
dt
→
t
(= 0
, Las curvas integrates no coinciden con Ias curves soluciois del Sistema .
Las curvas integrates induyen a Todas Ias curvas solution .
Las curvas solution no pueden cortarse por que Sino nose cumpliña lateoria de la unicidad .
Las curves integrates y Ias curves soluciois coinciden Cuando la gratia de la funcién es de Clase d ?
Las curvas integrates y Ias curves soluciois no coinciden Cuando la gratia de la funcioin no es de Clase d ?
'
ECUACIÉN AUTO NOMA : OH =
fly)
"
Si Yltlessoluciois ylttkltambieñ toes .
dt
-1 -1
✗ (t) =
= ✗ It -1k/ = ' K' c son constantes
t-1¢ ttk + ¢
t It) = t -1k ; di IT ) = OH ,
IT = OH Las soluci ones son invariantes a las traslaciones .
dt dt dt dt
:
Eiercicio :
[ In 11-4-14]
f %; =/ %
OH /In 11-1-14 ) Y=t2e&
{ In 1H
" ' '
" Y=e
flt.it de clase d In 11-1-14 →
= '
es
" → = tiny = 2
dt t
Ylt, K) = KTZ K -10
Ylt)=0
MÉTODO DE LA VARIACIÉN DE CONSTANTE5
OH flt) Si alt)
'
de Clase d hay
'
solucién esedominio
+ a Iti = yfltl son una unica en .
at
•
Ecuacioin lineal homogénea :
OH 1- alto -0 lfltl :o) Solucioin general de la ecuacién homogénea .
dt
✗
La Iinealidaddependeunicamente de y .
-
faltldt -
faltldt
f ¥ =/ faltldttci YH c)
'
-
altldt / Ho) × Int = - ' Nt/ = e e '
, = ce c -10
Supremos que la solution de la ecuacién lineal completes :
-
faltldt
✗ It/ = case
-
faltldt
-
faltldt -
faltldt
↳ "' "
/ faltldt
° d'
OH
dt
=
dt
do e- _
clue ¥ =
dte
-
cltle .
alt )
faltldt
faltldt
-
-
+
✗ It) = ciltle
AHH = alt ) date fact, dt
faltldt OH + alto, =
do
e- faltldt =
fit)
" de se
-
flt )
dt
/ fltle
dt dt
G' It) :
dtt G
'
G' C- IR
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