matlab求解微分方程答:程序1:function dx=diffequat1(t,x)dx=[x(2);7.5*cos(t)-0.05*x(2)-x(1)^3];程序2:x0=[3;4];tspan=[0,100];[T,X1]=ode15s('diffequat1',tspan,x0);figure(1)title(['+:x0=[3;4],*:x0=[3.1;4.1]']);subplot(2,2,1)plot(T,X1(:,1),'r+',T,X1(:...
求Matlab画常微分方程解答:D(i) m=m+1;y=y+p(m)*x.^(j-1).*exp(C(i)*x);endendplot(x,y,'r.')xlabel('x','fontsize',20)ylabel('y','fontsize',20)title('其中一个解:C1=-0.5,C2=1,C3=1,C4=1','color','b')函数程序:function [XE,NUM,N]=searchs(x)%M=length(x);k=ones(si...