eq. diff 4 -Forum Studenti

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eq. diff 4 -Forum Studenti

eq. diff 4

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3 messaggi[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable
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kippi: Nuovo utente; Messaggi:1; Iscritto il:venerdì 22 dicembre 2006, 12:15; Località:Pisa

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Messaggioda kippi » venerdì 22 dicembre 2006, 12:24

brutale: Utente in crescita; Messaggi:7; Iscritto il:sabato 27 dicembre 2008, 14:51

eq. diff 4

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Messaggioda brutale » sabato 27 dicembre 2008, 23:06

io ti consiglio di eliminare a priori il metodo delle variazioni delle costanti per risolvere questa equazione perchÃ¨ troppo elaborato come calcoli. La cosa migliore da fare Ã¨ utilizzare il metodo dell'indovino, provando a porre y(t) = Î»te^2t (perchÃ¨ come hai detto tu e^2t Ã¨ soluzione dell'omogonea associata), fatto questo poi ti calcoli la derivata prima e seconda e da li in poi sono tutti sostituzioni e calcoli semplici (io ho fatto cosÃ¬ e funziona). [/b]

Massimo Gobbino: Amministratore del Sito; Messaggi:2298; Iscritto il:lunedì 29 novembre 2004, 19:00; Località:Pisa; Contatta:
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Re: eq. diff 4

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Messaggioda Massimo Gobbino » martedì 30 dicembre 2008, 15:50

[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable
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3 messaggi[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable
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