Question

谁能帮我解一下这个方程呀,非线性的.谢谢了.

求未知常数K1,F,K,C1;
y1=(K1*0.1*F/(-K1+K)*exp(3*(-K1+K))+C1)*exp(-K*3));
y2=(K1*0.1*F/(-K1+K)*exp(18*(-K1+K))+C1)*exp(-K*18));
y3=(K1*0.1*F/(-K1+K)*exp(20*(-K1+K))+C1)*exp(-K*20));
y0=(K1*0.1*F/(-K1+K)*exp(0*(-K1+K))+C1)*exp(-K*0));
y1=763.9*4800;
y2=76.39*4800;
y3=53.4*4800;
y0=100000000;
请大家帮帮忙……谢谢！急用……

Answer 1

syms K1 F K C1
y1=763.9*4800;
y2=76.39*4800;
y3=53.4*4800;
y0=100000000;
s1=(K1*0.1*F/(-K1+K)*exp(3*(-K1+K))+C1)*exp(-K*3)-y1;
s2=(K1*0.1*F/(-K1+K)*exp(18*(-K1+K))+C1)*exp(-K*18)-y2;
s3=(K1*0.1*F/(-K1+K)*exp(20*(-K1+K))+C1)*exp(-K*20)-y3;
s0=(K1*0.1*F/(-K1+K)*exp(0*(-K1+K))+C1)*exp(-K*0)-y0;
很慢
很久都出不来结果，慢慢等