用matlab求解微分方程

Question

最好用matlab给出程序

Answer 1

syms x1 x2 x3 x4 F d
M=x4-6*F*x1/(x2*(x3-d));
M1=diff(M,x1);
M2=diff(M,x2);
M3=diff(M,x3);
M4=diff(M,x4);

dM=[M1 M2 M3 M4];
dx=[44 2.4 24 10.5];

x1=880;x2=30;x3=300;x4=350;

f=eval(M)+sum(eval(dM.*dx))

祝你学习愉快！