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matlabfrank 发表于 2007-4-30 23:31

这个方程组能解吗

<P>&gt;&gt;syms a b c m p<BR>&gt;&gt;[a b c m p]=solve('log(1/(2+p))=log(a)-m*log(197.4+p)-2*b+(c-1)*log(2)','log(1/(3+p))=log(a)-m*log(197.4+297.7+p)-3*b+(c-1)*log(3)','log((412.8+547)/(2*(197.4+297.7+412.8+p)))=log(a)-m*log(197.4+297.7+412.8+p)-4*b+(c-1)*log(4)','log((579.8+547)/(2*(197.4+297.7+412.8+547+p)))=log(a)-m*log(197.4+297.7+412.8+547+p)-5*b+(c-1)*log(5)','log((579.8+547.5)/(2*(197.4+297.7+412.8+547+579.8+p)))=log(a)-m*log(197.4+297.7+412.8+547+579.8+p)-6*b+(c-1)*log(6)')<BR>Warning: Explicit solution could not be found.<BR>a =<BR> <BR>[ empty sym ]<BR> <BR> </P>
<P>b =</P>
<P>     []</P>
<P><BR>c =</P>
<P>     []</P>
<P><BR>m =</P>
<P>     []</P>
<P><BR>p =</P>
<P>     []<BR>但这个方程组确实有解呀,怎么用matlab求不出来,是不是用别的函数,请大家给些意见或建议啊<BR></P>

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