Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Very simple symbol question regarding a logarithmic function (I can't find it!)

  1. Sep 12, 2004 #1
    Well I have this leftwards arrow in my book describing the solution to a logarithmic function and I've not seen it thus far and (if I was ever introduced to it) have since forgot what it means!

    When asked to find log(3)9
    3^x = 9
    3^x = 3^2
    <--x = 2
    log(3)9 = 2

    I'm not sure what the leftwards arrow beside the x is for :(

    Please forgive my logarithmic notation, I'm aweful with latex(?) so please note that 3 is the base (so I separated it in brackets).
     
  2. jcsd
  3. Sep 12, 2004 #2

    Tide

    User Avatar
    Science Advisor
    Homework Helper

    I don't think there is anything "standard" there. It's just the author's way of telling you to substitute the value x = 2 into the equation or that x = 2 is the solution.
     
  4. Sep 12, 2004 #3

    jcsd

    User Avatar
    Science Advisor
    Gold Member

    I'll take a guess: "it follows from".
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook