询问多个含未知数的矩阵相乘，如何求该未知数的解？
本人初学matlab，最近编程算2x2的矩阵相乘，pn=;een=;其中仅是w为未知数，矩阵I,和矩阵ek都是已知的2x2的矩阵，当计算t=p5*ee4*p4*ee3*p3*ee2*p2*ee1*p1*;b=solve(t(1,1))的时候能算出未知数的根，但是当计算算t=p6*ee5*p5*ee4*p4*ee3*p3*ee2*p2*ee1*p1*的时候计算变无法进行，出错的提示为：??? Operation terminated by user during ==> mupadengine.mupadengine>mupadengine.evalin at 117
In ==> mupadsym.mupadsym>mupadsym.char at 30
s = evalin(symengine,x.ref,'char');
In ==> sym.char at 50
c{k} = char(A(k).s);
In ==> solve>mupadSolve at 215
charR = char(R);
In ==> solve at 93
= mupadSolve(eqns,vars);
In ==> zizhenpinlv at 25
b=solve(t(1,1));
请问，有谁知道问题出在哪里？它自带的程序理解起来比较费劲啊
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