LOGARITMOS


 

 

·        Calcula los siguientes logaritmos:

 

 1 ) log 2 8   =  

                                                                                                         

 2 ) log 3 9   =                                                                                                          

 

 3 ) log 4 2   =    

                                                                                                         

 4 ) log 27 3   =     

                                                                                                         

 5 ) log 5 0,2   = 

                                                                                                         

 6 ) log 2 0,25   =  

                                                                                                         

 7 ) log 0,5 16   =   

                                                                                                         

 8 ) log 0,1 100   =   

                                                                                             

 9 ) log 3 27   +   log 3 1   =

                                                                                 

10 ) log 5 25   -   log 5 5   =  

                                                                                

11 ) log 4 64   +   log 8 64   =      

                                                                                 

12 ) log 0,1   -   log 0,01   =      

                                                                                 

13 ) log 5   +   log 20   =   

                                                                                             

14 ) log 2   -   log 0,2   =  

                                                                                             

15 )   =         

                                                                                                         

16 )   =     

                                                                                                         

17 ) log 2 3  ´  log 3 4   =                                                                                         

 

18 ) log 9 25  ¸  log 3 5   =                                                                                    

 

 

 

 

 

·        Determina el valor de   x  en las siguientes ecuaciones:

 

 1 ) log 3 81   =   x                                        

                                                          

 2 ) log 5 0,2   =   x  

                                                                                             

 3 ) log 4 64   =       

                                                                                 

 4 ) log 2 16   =             

                                                                                 

 5 ) log 2 x   =   - 3        

                                                                                             

 6 ) log 7 x   =   3                                                                                                     

 

 7 ) log 6 [ 4 ( x  -  1 ) ]   =   2      

                                                                                 

 8 ) log 8 [ 2 ( x 3  +  5 ) ]   =   2           

                                                                      

 9 ) log x 125   =   3           

                                                                                             

10 ) log x 25   =   - 2     

                                                                                             

11 ) log 2 x  +  3 81   =   2   

                                                                                             

 

12 ) x  +  2   =   10 log 5   

                                                                                             

13 ) x   =   10 4 log 2         

 

14 ) x   =                         

                                                                                 

15 ) x   =                   

                                                                                 

 

16 )   =   2                

                                                                                 

17 )   =   0,5                                                                                              

 

 

 

·        Si   log 2   =   0,301   ,   log 3   =   0,477   y   log 7   =   0,845   ,   entonces calcular :

 

 1 ) log 8   =     

       

                                                                                             

 2 ) log 9   =        

                                                                                                         

 

 3 ) log 5   =      

                                                                                                         

 

 4 ) log 54   =     

                                                                                                         

 

 5 ) log 75   =       

                                                                                                         

 

 6 ) log 0,25   = 

                                                                                                         

 

 7 ) log   =    

                                                                                             

 

 8 ) log   =  

                                                                                             

 9 ) log   =    

                                                                                             

 

10 ) log   =                                 

                                                                      

11 ) log 0,3   =                               

 

                                                                                 

12 ) log 1,25   =                                                                                                   

 

 

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