[tomsonqi]

t1=160;
t2=60;
t3=164;
u1=1.5;
u2=1.41;
u3=0.9;
r1=0.004;
i=10;
[r2,c2,c1] = solve('u1-i*r1=i*t1/c1+i*r2*(1-exp(-t1/(r2*c2)))','u2=i*t1/c1+i*r2*(1-exp(-t1/(r2*c2)))*exp(-t2/(r2*c2))','u3+i*r1=i*t1/c1-i*t3/c1-i*r2+(i*r2+i*r2*(1-exp(-t1/(r2*c2)))*exp(-t2/(r2*c2)))*exp(-t3/(r2*c2))');

这是我用matlab求解指数方程组的式子，已知上面这8项，求解r2,c2,c1。3个方程3个未知数，为啥求不出来呢？哪位大侠帮帮忙，要不答辩不了了，感谢大家啦。