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UBA - CienciaS :: Ver Tema - Primer recup. pr parcial . Primer cuat 2010 (17/07/10)
UBA - CienciaS
http://ubacs.com.ar/ubacs/

Primer recup. pr parcial . Primer cuat 2010 (17/07/10)
http://ubacs.com.ar/ubacs/viewtopic.php?f=13&t=2635
Página 1 de 1

Autor:  Equinoccio [ 06 Mar 2012, 00:43 ]
Asunto:  Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

1) Sea

a)Hallar, si es posible, de manera que f sea contínua en (0,0)
b)Para determinar si existen las derivadas parciales de f en (0,0)

2) Sea

a)Analizar si g es contínua en (0,1)
b)Hallar todos los , para los cuales exista.
c)Analizar si g es diferenciable en (0,1)

3)f:R2_R de clase C1 y g:R2_R definida por: .
Supongamos que el plano tangente al gráfico de f en el punto (1,0,f(1,0)) está dado por
a)Encontrar la direccion en la que la función z=f(x,y) crece más rápidamente en el punto (1,0)
b)Calcular el plano tangente al gráfico de la función g en el punto (0,0,g(0,0))

4)Sea f:R2_R, C2 tal que es el polinomio de Taylor de orden 2 de f alrededor del (2,0).Si , obtener el polinomio de Taylor de orden 2 de h alrededor del (2,0)

Autor:  franco [ 11 May 2012, 20:41 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)


Autor:  franco [ 11 May 2012, 22:56 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

Pucha, me quedé re trabado en el 2) a) !

Quiero ver que el límite de g(x,y) cuando tiende a (0,1) sea 2 .

Por álgebra de límites, sé que lím. (f+g+h) = lím. f + lím. g + lím. h .

Entonces en definitiva quiero que el lím. de sea 0 .

A mi me sonaba a que había que llevarlo a la forma cuando f tiende a 0, pero no pude.

Intenté probar que no existe, pero converge siempre en 0 .

y .

Cómo hago para demostrarlo? :<

Autor:  Rozen [ 21 Feb 2013, 15:25 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

Una boludez

Se q es al re pedo y q es una boludez pero prefiero dejarlo para el proximo q quiera saberlo

Autor:  foolosophy [ 21 Mar 2013, 10:14 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)


Autor:  foolosophy [ 21 Mar 2013, 10:21 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)


Autor:  cosa65 [ 18 Jul 2013, 12:04 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

el 1- a) alguien lo resolvio?? trate por varias rectas de encontrar que el limite no existiera pero siempre me dice que es 0!

Autor:  Quimey [ 18 Jul 2013, 12:30 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

El segundo post de este thread tiene una solución del ej. 1. Si tenés alguna pregunta concreta te puedo ayudar.

Autor:  cosa65 [ 18 Jul 2013, 15:22 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

si, lo habia visto pero no se si esta bien, cuando aplica L'hopital no debería irse tambien el -1? porque no esta multiplicado por ninguna variable, entonces quedaría 0, si podes decirme alguna trayectoria con la que puedo probar que no existe el limite, o avisarme si me equivoque en lo de L'hopital te lo agradeceria mucho :)

Autor:  Quimey [ 18 Jul 2013, 17:20 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

ehhh, en ese post hay 4 (si, 4) rectas en las que el limite da distinto y si, hay un error en l'hopital pero eso no impide que la demostracion siga andando (usando el valor correcto de l'hopital)

Autor:  cosa65 [ 18 Jul 2013, 20:16 ]
Asunto:  Re: Primer recup. pr parcial . Primer cuat 2010 (17/07/10)

aaa si ahi abajo de todo estaba jaja perdon, mi error

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