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