Exercice 30
                              
                   a       1
                                2 1
                              
         AB =  2a 2 4 4 − 2a 
               −
                          1  4 a
                2−a      a−2
                                           
                  2a        4     a     a
                      +             +      
            =  2a − 4 4 − 2a 2a − 4 4 − 2a 
                                           
                   4       4       2   a 
                      +             +
                 2−a a−2         2−a a−2
                             
                2a − 4
                         0      1 0
            =  2a − 4 2 − a  =
                             
               0                0 1
                         2−a

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Ch10 30

  • 1. Exercice 30   a 1  2 1   AB =  2a 2 4 4 − 2a   −  1  4 a 2−a a−2   2a 4 a a  + +  =  2a − 4 4 − 2a 2a − 4 4 − 2a    4 4 2 a   + + 2−a a−2 2−a a−2   2a − 4  0  1 0 =  2a − 4 2 − a  =    0  0 1 2−a