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AlphaGamma
.piano ma pieni.

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No, il metodo classico! Come spiegarlo? Uhm... :pensa:
Scusa, ma come lo calcoli il determinante di una matrice nxn?

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18-09-2003 19:43
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0m4r
.grande:maestro.

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con la regola dei minori complementari...c'hai presente?

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18-09-2003 19:44
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frieduz
.consigliere.

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Originally posted by 0m4r
Un'altro quesito

code:
1 k-1 k 2 k 3 4 k+1 6

per quali valori di k la matrice è invertibile?

la mia risposta:
è invertibile se il determinante è diverso da 0, quindi calcolo il determinate con la regola si Sarrus e ottengo cosi: -2k^2+5k-3.
Determino i valori di k che rendono nulla l'equazione di secondo grado e dico che la matrice è invertibile per ogni k diverso dai valori appena calcolati.

Io per k ho ottenuto -1/2 e 3, ma dal libro le soluzioni sono 1 e 3/2...chi ha ragione?

Off-Topic:
AlphaGamma, scuota la cartella dei pm!


Il libro!!
code:
-2k^2+5k-3=0 k1=(-5+1)/-4=1 k2=(-5-1)/-4=3/2

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19-09-2003 11:51
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0m4r
.grande:maestro.

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ma vui dire che non so fare i calcoli?...ora li rifaccio...
ehm...casso, meno per meno fa piu! te lo nsegnao alle elementari...che ASINO!

non passerò mai l'esame

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Last edited by 0m4r on 19-09-2003 at 14:15

19-09-2003 14:11
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frieduz
.consigliere.

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Originally posted by 0m4r
ma vui dire che non so fare i calcoli?

Non mi permetterei mai...
diciamo che io & il libro li facciamo meglio!!!!!!!!!!!:P

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19-09-2003 14:15
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