Groups > comp.soft-sys.math.mathematica > #3053

How to make the same two expressions

From	Mariano Pierantozzi <mariano.pierantozzi@gmail.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	How to make the same two expressions
Date	2011-06-10 10:39 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<isss9i$jg1$1@smc.vnet.net> (permalink)

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Hi everyone,
i've this problem with Mathemtica:
i've got 2 expression depending on a and b:
expr1= -1.0019 - 1. Log[0.00190438 - 0.0249519 b] + (0.000040093 a
Log[0.152644/(0.152644 + 2 b)])/b
expr2=-1.00004 - 1. Log[0.0000378969 - 0.0249519 b] + (0.000040093 a
Log[0.0030376/(0.0030376 + 2 b)])/b
I want to make the same this two expressions.
The problem is that if i try to solve this is one equation in two parameter:
a and b.
So i think to put inside some value of a and b so i make equal the two
expression less than 10^-12 (for example)
I've to do a list of value:
b can vary beetwen -0.0015188 < b < 0.0015188 (the domain of logarithmic
function) and a must vary for example  -2000 to 2000.
I can not find a waydo it. I try with list, and put the value inside, but
i've some problem.
if anyone can help I would be grateful...
Thank you!

Mariano Pierantozzi
PhD student

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Thread

How to make the same two expressions Mariano Pierantozzi <mariano.pierantozzi@gmail.com> - 2011-06-10 10:39 +0000
  Re: How to make the same two expressions Peter Breitfeld <phbrf@t-online.de> - 2011-06-11 07:58 +0000
  Re: How to make the same two expressions "Dr. Wolfgang Hintze" <weh@snafu.de> - 2011-06-11 10:50 +0000

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