Re: cannot solve *trivial* equation
- To: mathgroup at smc.vnet.net
- Subject: [mg34395] Re: cannot solve *trivial* equation
- From: "milkcart" <milkcart at m17.alpha-net.ne.jp>
- Date: Sat, 18 May 2002 03:50:56 -0400 (EDT)
- References: <200205171031.GAA03799@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi marco
Your system of equations consists of two equations with three variables.
If a number is asigned to q, you can solve these equations with a and s.
If a number is assigned to a, you can solve these with q and s.
Ways of solving equations are not unique.
You can solve system of equations as follows:
In[8]:=
Solve[{a == s + q, q == 2 s}, s, {q}]
Out[8]=
a
{{s -> -}}
3
In[9]:=
Solve[{a == s + q, q == 2 s},
s, {a}]
Out[9]=
q
{{s -> -}}
2
******************
milkcart
milkcart at m17.alpha-net.ne.jp
****************************
> Hi,
>
> I just tried a friend's Mathematica 4.0.0.0:
>
> Solve[{A == S + Q, Q == 2*S}, A]
>
> => {A->3*S}
>
> Solve[{A == S + Q, Q == 2*S}, S]
>
> => {}
>
> Can somebody explain this to me? (ie. "bug","you stupid")
>
> Marco
>
>
>
>
- References:
- cannot solve *trivial* equation
- From: Marco Manfredini <marco@technoboredom.net>
- cannot solve *trivial* equation