MATLAB教程R2014a答案全张志涌

3)^(1/2)Р -(- 3*x^2 + 2*C3)^(1/2) Р%此题存疑Рhold on;clear all;Рreset(symengine);Рsyms x;Рy1=(- 3*x^2 + 2*1)^(1/2);Рy2=-(- 3*x^2 + 2*1)^(1/2);Рh1=ezplot(y1,x,[-2 2 -2 2],1);Рh2=ezplot(y2,x,[-2 2 -2 2],1);Рgrid on;title('');warning off;axis([-2 2 -2 2]);Рset(h1,'color','r','linewidth',2);Рset(h2,'color','r','linewidth',2);Рxlabel('Y');ylabel('x'); Р Р%对于第二章存在问题的习题的探讨Р2.23Рclear all;Рsyms x;Рyso=simplify(dsolve('Dy*y*0.1+0.3*x=0','x')) Р%此题存疑Рhold on;clear all;Рreset(symengine);Рsyms x;Рy1=(- 3*x^2 + 2*1)^(1/2);Рy2=-(- 3*x^2 + 2*1)^(1/2);Рh1=ezplot(y1,x,[-2 2 -2 2],1);Рh2=ezplot(y2,x,[-2 2 -2 2],1);Рgrid on;title('');warning off;axis([-2 2 -2 2]);Рset(h1,'color','r','linewidth',2);Рset(h2,'color','r','linewidth',2);Рxlabel('Y');ylabel('x'); Рyso =Р (- 3*x^2 + 2*C3)^(1/2)Р -(- 3*x^2 + 2*C3)^(1/2)