Forum Studenti •Forme quadratiche 2

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Forum Studenti •Forme quadratiche 2

Pagina 1 di 1

Forme quadratiche 2

Inviato: sabato 18 gennaio 2014, 20:03

da GIMUSI

allego le soluzioni :?:

:?:

con svolgimento :?:

:?:

del test n.43 “Forme quadratiche 2”

alex994 ha segnalato un errore nella prima forma quadratica del secondo esercizio:

- il polinomio caratteristico è [tex](2-\lambda)(\lambda^2-4\lambda+3-a^2/4)[/tex]

- il determinante è: [tex]p(0)=6-a^2/2[/tex]

Re: Forme quadratiche 2

Inviato: giovedì 23 gennaio 2014, 15:37

da Paolo

Ciao, volevo chiederti se nell'esercizio 1 , forma canonica 2 , punta a la traccia non dovresti porla < 0 ? ... In cartesio per averla definita positiva non dovrebbero esserci due variazioni?

Re: Forme quadratiche 2

Inviato: giovedì 23 gennaio 2014, 15:57

da GIMUSI

Re: Forme quadratiche 2

Inviato: sabato 25 gennaio 2014, 10:26

da alex994

scusa GIMUSI, ma nella quarta forma quadratica, primo esercizio, punto a, quando dici IMPOSSIBILE, non dovrebbe essere λ2 > 0, invece di < ??

Re: Forme quadratiche 2

Inviato: sabato 25 gennaio 2014, 10:31

da GIMUSI

Re: Forme quadratiche 2

Inviato: sabato 25 gennaio 2014, 11:02

da alex994

ma nel secondo esercizio, prima equazione, il det non è 6-a^2/2 invece di 6-a^2/4 ?

Re: Forme quadratiche 2

Inviato: sabato 25 gennaio 2014, 14:17

da GIMUSI