- - -
: y''+y=ctgx, >
> >
Danilka
:

1) y''+y=ctgx

( . )

2) y''''- 8*y' = (x^2) + 1 + x*sin((3^(1/2))*x) - 2*e^(2*x)

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Danilka
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Danilka




Dimka
Danilka
(Dimka @ 21.2.2010, 11:33) *





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Dimka
., . ?
Dimka
(Danilka @ 21.2.2010, 17:44) *

..

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.. " " . 404
Danilka
(Dimka @ 21.2.2010, 19:25) *

.. " " . 404



0 =



1 =



2 =




3 =



2 3 , sad.gif sad.gif sad.gif
Dimka
y0 - . . ?
Danilka
(Dimka @ 21.2.2010, 23:53) *

y0 - . . ?



(^4)-(8*)=0

1 = 0
= 2

Dimka


(^4)-(8*)
Danilka
(Dimka @ 23.2.2010, 13:04) *



(^4)-(8*)



:

()*(((^3)-8) = 0

1 = 0
2 = 2
Dimka
(p^3)-8

p.s. p
Danilka
(Dimka @ 23.2.2010, 16:21) *

(p^3)-8

p.s. p



p*(p-1)*((p^2)+p+1) = 0
Dimka
.
p*(p-1)*((p^2)+p+1)=p^4-p, p^4-8p
Danilka
(Dimka @ 23.2.2010, 21:10) *

.
p*(p-1)*((p^2)+p+1)=p^4-p, p^4-8p





....

p*(p-8)*((p^2)+8p+64)
Dimka
(Danilka @ 23.2.2010, 22:53) *

....

p*(p-8)*((p^2)+8p+64)


no.gif
p*(p-8)*((p^2)+8p+64)=p^4-512*p

Danilka
p*(p-2)*((p^2)+2p+4)
Dimka
, , 0
p=0, p1=0,
p-2=0, p2=2,
((p^2)+2p+4)=0, p3=..., p4=....

p3 p4 ?
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