Student Support Forum: 'Solving for a variable' topicStudent Support Forum > General > "Solving for a variable"

 Next Comment > Help | Reply To Topic
 Author Comment/Response Gerhard Schoenthal 10/30/00 05:45am If I have the following notebook why do I get {{ }} as an answer at the bottom and how should I fix my problem? Gerhard In[1]:= \!\(Cx = \(\[Epsilon]x*\[Epsilon]o*A\)\/xx\) Out[1]= \!\(\(A\ \[Epsilon]o\ \[Epsilon]x\)\/xx\) In[2]:= \!\(Cs = \(\[Epsilon]s*\[Epsilon]o*A\)\/xs\) Out[2]= \!\(\(A\ \[Epsilon]o\ \[Epsilon]s\)\/xs\) In[29]:= \!\(Cm = \(\[Epsilon]m*\[Epsilon]o*A\)\/xm\) Out[29]= \!\(\(A\ \[Epsilon]g\ \[Epsilon]o\)\/xm\) In[10]:= \[Epsilon]m=\[Epsilon]s=\[Epsilon]g Out[10]= \[Epsilon]g In[5]:= Sx=1/Cx Out[5]= \!\(xx\/\(A\ \[Epsilon]o\ \[Epsilon]x\)\) In[14]:= Ss=1/Cs Out[14]= \!\(xs\/\(A\ \[Epsilon]g\ \[Epsilon]o\)\) In[30]:= Sm=1/Cm Out[30]= \!\(xm\/\(A\ \[Epsilon]g\ \[Epsilon]o\)\) In[18]:= Smax=2*(Sx+Ss) Out[18]= \!\(2\ \(( xs\/\(A\ \[Epsilon]g\ \[Epsilon]o\) + xx\/\(A\ \[Epsilon]o\ \[Epsilon]x\))\)\) In[31]:= Smin=Smax+Sm Out[31]= \!\(xm\/\(A\ \[Epsilon]g\ \[Epsilon]o\) + 2\ \((xs\/\(A\ \[Epsilon]g\ \[Epsilon]o\) + xx\/\(A\ \[Epsilon]o\ \[Epsilon]x\))\)\) In[32]:= Cr=Smin/Smax Out[32]= \!\(\(xm\/\(A\ \[Epsilon]g\ \[Epsilon]o\) + 2\ \((xs\/\(A\ \[Epsilon]g\ \[Epsilon]o\) + xx\/\(A\ \[Epsilon]o\ \[Epsilon]x\))\)\)\/\(2\ \((xs\/\(A\ \[Epsilon]g\ \[Epsilon]o\) + xx\/\(A\ \[Epsilon]o\ \[Epsilon]x\))\)\)\) In[35]:= Simplify[Out[32]] Out[35]= \!\(\(2\ xx\ \[Epsilon]g + xm\ \[Epsilon]x + 2\ xs\ \[Epsilon]x\)\/\(2\ xx\ \[Epsilon]g + 2\ xs\ \[Epsilon]x\)\) In[38]:= Solve[Cr==Out[35],xm] Out[38]= {{}} URL: ,

 Subject (listing for 'Solving for a variable') Author Date Posted Solving for a variable Gerhard Scho... 10/30/00 05:45am Re: Solving for a variable Forum Modera... 10/30/00 06:00am
 Next Comment > Help | Reply To Topic