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ExamSecond midtermExam paper only

04 02 2013

Study material for Analisi Matematica 2, shared by the Studwiz community and reviewed by moderators.

Analisi Matematica 2Second midterm

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ANALISI MATEMATICA 2 2 prova in itinere 04/02/2013 domanda 1 2 3 4 5 6 7 totale punteggio 1 3 5 5 5 3 2 2 1 4 31 voto Cognome............................................ .................Nome.............................. ............ n.di matricola...................................... .............. Firma................................ ............. n.d’iscrizione............................ 1) Sia y f(x) la funzione 2  periodica definita in [ ,  da f(x)x(  |x| a) disegnare il grafico qualitativo di f(x) in [-3 , 3 b) scrivere la serie di Fourier associata a f, calcolando i co efficienti b) f(x) 8   sen 2k1x 2k13 Calcoli bn  2  0  x  xsennxdx  2  x  x cos nx n  0    x cos nx n dx   2  x  x sennx n2  0  2 sennx n2 2    2 sennx n2  2 cos nx n2   8/n3 n dispari 0 n pari 2) Risolvere il seguente problema di Cauchy yx   1 6 1senx  senx yx  cos xe senx 3 y2 y/4  0 y(x) (e senx senx  2 /21/3 y’y2   1 6 1senx  senx y3  cos xe senx 3 y3  t 3y’y2  t t’- 1 2 cos x senx t  cos xe senx 3 te senx senx  c y(e senx senx  c1/3 y/4  0 per c- 2 /2 3)Risolvere il seguente problema di Cauchy x2yx  5xyx  4yx  1 x2 y1  0 y1  1 yx  1 t2 log t  1 2t2 log 2t Cal col i Equazione di Eulero x et y”4y’4ye2t yAte 2t  Be 2t yCt 2e2t  C  1/2 yA log x x  B 1 x2  1 2x2 log 2x per il pb. di Cauchy A 1, B0 4) Risolvere la seguente equazione y’(t) t2  ty t ty t  y2t yt   t2  1/C21/2 Eq. omogenea y(t)tz(t) l eq . diventa ztz’ 1z  z 1  z2 dz  dt t   1 2 log 1  z2  log Cx   yt   t2  1/C21/2 5) Calcolare per serie il seguente integrale: I 0 1 x2/3 cos xdx con E102 I 51/110 calcoli x 2/3 cos x  1n…

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