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\log_{4} x + \log_{4} (x+5) = 6


Sagot :

       log(4)x + log(4)(x + 5) = 6
log(4)x + log(4)x + log(20) = 6
               log(8)x + log(20) = 6
                           - log(20)  - log(20)
                              log(8)x = 6 - log(20)
                               log(8)         log(8)
                                       x ≈ 0.999