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Math Help - help with logs

  1. #1
    Newbie
    Joined
    Nov 2008
    Posts
    6

    Exclamation help with logs

    can someone please show me how to do the following equations:

    directions given to me: write expression as the log of a single quanity.

    1) 2log(x+4)

    2) 4[lnz+ln(z+5)]-2ln(z-5)

    3) 8log(Square root of (3x-2))- log(4/x)+log4

    thanks so much!
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  2. #2
    Junior Member
    Joined
    Oct 2008
    Posts
    64
    You need to apply these rules:
    1) log a^b=blog a
    2)log (ab) = log a + log b
    3) log (a/b)= log a - log b
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