| 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]=
{{}}
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