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.dsy:it. : Powered by vBulletin version 2.3.1 .dsy:it. > Didattica > Corsi G - M > Matematica del continuo > Filez - CdL Informatica > Svolgimento esercizi M.d.C A.A 2014/15
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bia.dade
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Registered: Mar 2007
Posts: 8 (0.00 al dì)
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Corso: Informatica F49
Anno: F.C
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Svolgimento esercizi M.d.C A.A 2014/15

Foglio 2 ES. 2.2 #C [COMPLETO]

Attachment: foglio2_es_2_2_#c.pdf
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Davide

Last edited by bia.dade on 31-10-2014 at 18:15

31-10-2014 16:01
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bia.dade
.novellino.

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Registered: Mar 2007
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Corso: Informatica F49
Anno: F.C
Time Online: 7:29:50 [...]
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Foglio 2 ES. 2.3 #B [POST TO DELETE]

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Davide

Last edited by bia.dade on 31-10-2014 at 18:14

31-10-2014 18:06
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bia.dade
.novellino.

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Registered: Mar 2007
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Corso: Informatica F49
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Time Online: 7:29:50 [...]
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Foglio 2 ES. 2.3 #B [COMPLETO]


OK: bisogna applicare Ruffini:

radice del polinomio: +7 perché sostituendo al posto di n nel polinomio

n^3 - 3n^2 + 2n - 210 = 0 ottengo:

(7)^3 - 3(7)^2 + 2(7) - 210 = 0

343 - 147 + 14 - 210 = 0

0 = 0

n = 7

Applico Ruffini:

// | 1 -3 2 | -210
7 |// 7 28 | 210
_____________________
// | 1 4 30 | 0


ottengo quindi:

(n-7) (n^2 + 4n +30) = 0

risolvo con formula:

-b^2 +/- sqrt(b^2 - 4ac)
_____________________
2a

ottengo delta negativo sqrt(16-120) quindi non ho nessuna soluzioni che n = 7

A breve integro nel pdf la soluzione.

Attachment: foglio2_es_2_3_#b.pdf
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Davide

Last edited by bia.dade on 03-11-2014 at 15:45

31-10-2014 18:08
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