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write as a single logarithm with a coefficient of 1

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Assume that 2 is the base of the Log:
 
   log2( X -1) + log 2 ( X +1) - log 2 ( X2 -1) =
 
 
    log2 ( X-1)( X+1) =  log 2 (1) = 0
             X2 - 1
 
    Using the relation ship of    Log ( AB ) = logA + log B
                                            Log ( A/ B)= LogA - Log B
 

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