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Simplifying LN and logs

  1. Nov 3, 2008 #1
    is it possible to simplify this more?!?!

    Ln(log7-log76)=

    Ln(log77)
     
  2. jcsd
  3. Nov 3, 2008 #2

    symbolipoint

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    To start with, some of that does not look correct. You are missing the antilog in one of your "log" expressions. (log7(ofWhat?)-log76)=
     
  4. Nov 3, 2008 #3

    symbolipoint

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    ... to continue, search in your book about adding or subtracting logarithms of the same base. log(A) + log(B) = ? and log(A) - log(B) = ?
     
  5. Nov 4, 2008 #4

    HallsofIvy

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    Persumably you mean ln(log7 x- log7 6) for some number x that you forgot. Certainly log7 x- log7 6= log7(x/6). If that is, as you appear to be saying, log7 7, then x must have been equal to 7(6)= 42.
    Yes, ln(log7(42)- log7(6))= ln(log7 7)

    Further, by the very definition of log, log7= 1 so what you have reduces to just ln(1)= 0. It that simple enough?
     
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