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Homework Help: Logarithms and Index Laws help

  1. Jun 13, 2010 #1
    !!!!Logarithms and Index Laws help!!!!

    Ive been trying to complete a revision sheet but it has logarithims and index laws, and i don't know how to do them. Ive included a few of the hardest questions frome the revision sheet in the attachment.


    ..........Look at attachment.............



    I've tried the first question fir the logs:
    Log 6 + Log 4
    So i separated the two logs and didthem sepratly:
    Log 6
    x = Log^10 (6)
    10^x = 6?

    Log 4
    x = Log^10 (4)
    10 = 4 ???

    Then i get stuck there, could someone please show me an example so i can attempt the rest of the questions on the sheet.

    And with the index laws i couldn't even start, had no idea wat to do.

    can someone please help!!!!
     

    Attached Files:

    Last edited: Jun 13, 2010
  2. jcsd
  3. Jun 13, 2010 #2
    Re: !!!!Logarithms and Index Laws help!!!!

    umm.... i dont know if this is what they are asking for...
    log4+log6 = log24
    is that simplifying?
     
  4. Jun 13, 2010 #3
    Re: !!!!Logarithms and Index Laws help!!!!

    THAT SOUNDS ABOUT RITE, THEN I CAN JUST SIMPLIFY IT further.
     
  5. Jun 13, 2010 #4
    Re: !!!!Logarithms and Index Laws help!!!!

    can someone else check it as well, cus I'm still a little confused.
     
  6. Jun 13, 2010 #5
    Re: !!!!Logarithms and Index Laws help!!!!

    So Log 24
    x = Log^10 (24)
    then get rid of the log:
    10^x = 24^?
    But wat power should 24 be so that it equals 10.

    is this even correct????

    Someone please help.
     
  7. Jun 13, 2010 #6

    rl.bhat

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    Homework Helper

    Re: !!!!Logarithms and Index Laws help!!!!

    No further simplification. That is the answer.
     
  8. Jun 13, 2010 #7
    Re: !!!!Logarithms and Index Laws help!!!!

    Really, so its just Log 24?
     
  9. Jun 13, 2010 #8

    rl.bhat

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    Homework Helper

    Re: !!!!Logarithms and Index Laws help!!!!

    Yes.
     
  10. Jun 13, 2010 #9
    Re: !!!!Logarithms and Index Laws help!!!!

    Ok thanks so much for the help.
     
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