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Homework Help: Help with log homework please

  1. Oct 23, 2008 #1
    Is log49/4+log9/35-log21/10 = log2/3 ?

    I've tried and I'm here 2log1/5+2log2/5-log7=log2/4 , if I didn't do anything wrong, but I don't know what to do then , please help me !!!!
     
  2. jcsd
  3. Oct 23, 2008 #2

    mgb_phys

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    Re: Logarithms.

    log(a) + log(b) = log(ab) is one of the useful properties of logarithms
     
  4. Oct 23, 2008 #3

    HallsofIvy

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    Re: Logarithms.

    Please use parentheses! Does "log1/5" mean log(1/5) or log(1))/5? And please show how you got that result.
     
  5. Oct 23, 2008 #4

    tiny-tim

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    Hi enibaraliu! :smile:
    erm :redface: … log A + log B = log AB

    log A - log B = log A/B

    Try again! :smile:
     
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