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MathGroup Archive 2001

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Re: Defining a function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg28589] Re: [mg28572] Defining a function
  • From: Andrzej Kozlowski <andrzej at tuins.ac.jp>
  • Date: Mon, 30 Apr 2001 03:02:02 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Do you mean something like:

In[11]:=
Solve[{a == x + y, b == x*y}, {b}, {y}]

Out[11]=
{{b -> (a - x) x}}

or

In[12]:=
Solve[{a == x + y, b == x*y}, {b}, {x}]

Out[12]=
{{b -> (a - y) y}}
?

-- 
Andrzej Kozlowski
Toyama International University
JAPAN

http://platon.c.u-tokyo.ac.jp/andrzej/
http://sigma.tuins.ac.jp/




on 01.4.29 10:35 AM, Jesse Marder at yarblocks at yahoo.de wrote:

> Hello.
> 
> I have for example:
> 
> a = x + y and
> b = x*y
> 
> whats the procedure to express b as a function of a in Mathematica?
> 
> Thank you.
> Jesse.
> 
> 




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