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Logarithmic Help

  • Thread starter stosw
  • Start date
21
0
1. Homework Statement

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


2. Homework 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:

Answers and Replies

938
9
Your task is to approximate 2 and 3 as 1.1^N and 1.1^M, and solve z from there.
 
HallsofIvy
Science Advisor
Homework Helper
41,738
898
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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