Mensaje de error

  • Notice: Trying to access array offset on value of type null en theme_pager() (línea 331 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_first() (línea 459 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_previous() (línea 489 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 528 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 529 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_last() (línea 564 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 528 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 529 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 528 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 529 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 528 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 529 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 528 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 529 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 528 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_next() (línea 529 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Notice: Trying to access array offset on value of type null en theme_pager_last() (línea 564 de /home1/montes/public_html/drupal/includes/pager.inc).
  • Deprecated function: The each() function is deprecated. This message will be suppressed on further calls en book_prev() (línea 775 de /home1/montes/public_html/drupal/modules/book/book.module).
  • Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
  • Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
  • Notice: Trying to access array offset on value of type int en element_children() (línea 6422 de /home1/montes/public_html/drupal/includes/common.inc).
  • Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters en drupal_get_feeds() (línea 394 de /home1/montes/public_html/drupal/includes/common.inc).

Cuestion 1 EDiferenciales 1109S2

Solapas principales

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a)

Resolucion:

Vamos a demostrar que yp=A*x es una solucion particular de la ecuacion diferencial (1+x^3)*y'+2*x*y^2+x^2*y+1=0
 
y_p=A\cdot x
y_p'=A
 
(1+x^3)\cdot y'+2\cdot x\cdot y^2+x^2\cdot y+1=0
 
(1+x^3)\cdot A+2\cdot x\cdot (A\cdot x)^2+x^2\cdot A\cdot x+1=0
A+x^3\cdot A+2\cdot A^2 \cdot x^3+x^3\cdot A+1=0
 
(A+1)+2\cdot x^3\cdot A+2\cdot A^2 \cdot x^3=0
 
(A+1)+2\cdot x^3\cdot A\cdot (1+A)=0
 
(A+1)\cdot (1+2\cdot x^3\cdot A)=0
 
A=-1
A=\frac{-1}{2\cdot x^3}
 
 
 
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