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11. LÍMITES DE FUNCIONES.

  1. Calcula los siguientes límites:

                     
  a) lim x 2  5 x  7  1
      x 2

  b) lim x  5 x  7   
               2

      x 

  c) lim  x  7 x  5  
                   2

     x 

  d) lim x  9 x  6  
              3

     x 

  e) lim x  2 x  1  + 
              2

     x 

  f) lim  x  5 x  7   - 
                   2

     x 

  g) lim x  7 x  1  - 
              3        2

     x 


  2. Calcula los siguientes límites:
           x 2  6x  8    
  a) lim  x 2  2      IND  1
                         
     x                 
            x 2  6x  8                   x2
  b) lim                    IND  lim 2  1
      x     x2  2    
                                         x  x

            x4 1                   x4
  c) lim  3
                       IND  lim 3  
                    
     x  x  1              x  x

             x4 1                  x4
  d) lim    3         IND  lim 3  
                    
     x    x  1           x   x

             x5 1                  x5
  e) lim  7          IND  lim 7  0
                   
     x  x  1             x  x

             x5 1                  x5
  f) lim    7         IND  lim 7  0
                    
     x    x  1           x   x

             x2  1 2
  g) lim            1
                     2
       x 1  x  1 

                 3      3
  h) lim                IND  no existe
        x 3 x  3     0
             3                       3
   lim              , lim               
    x 3 x  3            x 3 x  3

               x2  x  2  0                     ( x  1)( x  2)         ( x  1)  3 
  i) lim 2                    IND  lim                           lim               IND 
       x 2 x  4 x  4        0                     ( x  2)        x 2 ( x  2)   0
                                                                2
                                              x 2

           ( x  1)                  ( x  1)
  lim                 , lim                 
   x 2  ( x  2)            x 2  ( x  2)

                x 2  2x  2   1
  j) lim                        IND  no existe
     x 1   x  3x  3x  1  0 
              3       2

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11. límite de funciones

  • 1. 11. LÍMITES DE FUNCIONES. 1. Calcula los siguientes límites:   a) lim x 2  5 x  7  1 x 2 b) lim x  5 x  7    2 x  c) lim  x  7 x  5   2 x  d) lim x  9 x  6   3 x  e) lim x  2 x  1  +  2 x  f) lim  x  5 x  7   -  2 x  g) lim x  7 x  1  -  3 2 x  2. Calcula los siguientes límites:  x 2  6x  8     a) lim  x 2  2      IND  1  x      x 2  6x  8     x2 b) lim       IND  lim 2  1 x  x2  2      x  x  x4 1    x4 c) lim  3      IND  lim 3    x  x  1   x  x  x4 1    x4 d) lim   3     IND  lim 3    x    x  1   x   x  x5 1    x5 e) lim  7     IND  lim 7  0  x  x  1   x  x  x5 1    x5 f) lim   7     IND  lim 7  0  x    x  1   x   x  x2  1 2 g) lim     1  2 x 1  x  1  3  3 h) lim    IND  no existe x 3 x  3 0 3 3 lim   , lim   x 3 x  3 x 3 x  3 x2  x  2  0  ( x  1)( x  2) ( x  1)  3  i) lim 2    IND  lim  lim    IND  x 2 x  4 x  4 0 ( x  2) x 2 ( x  2) 0 2 x 2 ( x  1) ( x  1) lim   , lim   x 2  ( x  2) x 2  ( x  2) x 2  2x  2 1 j) lim    IND  no existe x 1 x  3x  3x  1  0  3 2