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Logarithmic Help

  1. Nov 10, 2009 #1
    1. The problem statement, all variables and given/known data

    http://img20.imageshack.us/img20/1476/mathproblemi.jpg [Broken]


    2. Relevant equations

    Properties of logs.

    3. The attempt at a solution

    For the first two I did:

    Int( [tex]\frac{Log(2)}{Log(1.1)}[/tex] )

    Doing this resulted in the correct answers for the first two boxes. When I try similar techniques to solve for z, m,n I get incorrect answers.

    Anyone have tips or suggestions on how to go about finding these?
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Nov 10, 2009 #2
    Your task is to approximate 2 and 3 as 1.1^N and 1.1^M, and solve z from there.
     
  4. Nov 10, 2009 #3

    HallsofIvy

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    Staff Emeritus
    Science Advisor

    If [itex]1.1^7[/itex] is approximately 2 then [itex]2^x[/itex] is approximately [itex](1.1^7)^x= 1.1^{7x}[/itex]. That's the point of this exercise.
     
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