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Log questions i need help with

  1. Jul 22, 2009 #1
    i need help with the following quesitons;

    a) log_3 27x^2
    b) ln (x^2 / y^2)
    c) ln (xe^x)
    d) log (2x + 3y)

    i dont mind if you could direct me in the right direction and i will do my best to go from there :)

    USING THE RULES FOR LOGS, SPLIT THE FOLLOWING UP INTO SEPERATE LOGARITHM FUNCTIONS AND NUMBERS AS MUCH AS POSSIBLE?
     
    Last edited: Jul 22, 2009
  2. jcsd
  3. Jul 22, 2009 #2

    berkeman

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    Staff: Mentor

    Depends on what x and y are. Could you please provide the full problem statement, and then show us your attempt at the solutions?
     
  4. Jul 22, 2009 #3

    HallsofIvy

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    Staff Emeritus
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    First, do you know the "laws of logarithms"?

    [itex]log_a(xy)= log_a(x)+ log_a(y)[/itex]
    [itex]log_a(x^y)= ylog_a(x)[/itex]

    Also you should know that [itex]log_a(a^x)= x[/itex].
     
  5. Jul 22, 2009 #4
    Using the rules for logs, split the following up into seperate logarithm functions and numbers as much as possible?
     
  6. Jul 22, 2009 #5

    berkeman

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    Staff: Mentor

    Okay, so using the hints/review from HallsofIvy, show us your tries at simplifying those equations...
     
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