Saturday, November 14, 2009

Inverses and Logs

from what i understand about inverses is that they are the complete opposites of each other. for example, the inverse of (f) is (f^-1). if you are squaring something then in the inverse you would have to square root it. or another example would be if you are multiplying by, lets say, 3 then in the inverse you would have to divide by 3 instead. thats what i understand about inverses.

first of all the default base of a log is always 10. usually an example of a log would look like this, log100=x. this would turn out to look more like this, 100=10^x. now the answer is x=2 because 10 squared is equal to 100. this is pretty much what i get from logs. also if the base and the little number right after the word log are the same then they cancel out.

questions:
  • are ln and log the same things?
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6 comments:

  1. Pascual OrozcoNovember 14, 2009 at 1:55 PM

    no, natural log has a base of e and logs can have a base of any number

    ReplyDelete
  2. Dianna BarbaNovember 14, 2009 at 9:16 PM

    No
    Natural Log (ln) is also equal to log base e
    and log is just log.

    ReplyDelete
  3. diazrobertNovember 14, 2009 at 9:45 PM

    ln has the base of e and the log can have any base

    ReplyDelete
  4. Javier HernandezNovember 15, 2009 at 12:15 AM

    no!.. haha

    ln can be re-written as loge (e is the base)

    log can have any base (ex. log2, log50, log100)

    ReplyDelete
  5. Monica SagastumeNovember 18, 2009 at 5:57 PM

    Lets say y = ln(x); z=log t
    ln is log base e AND log is log base 10.

    THIS IS WHAT THEY BECOME:
    e^y = x; 10^z = t

    SO THE BOTH GIVE YOU A DIFFERENT OUTPUT

    ReplyDelete
  6. Christian TorresNovember 18, 2009 at 8:19 PM

    Nope they are not.
    theyre to completly different things.

    Natural Logs or ln has a base of e.

    Logs can have any number or variable as a base.

    ReplyDelete

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