y1=x.(-2);y2=x.(-4); plot(x, yl, x, y2, linewidth, 2), hold on plot([-2,2],[0,0],r’,[0,0],[-500,500],r’) axis(-1,1,-20,500]); legend('x^-2’,’x-4'); 幂函数 图象 clf,x=0:0.02:1.6; 1=x.2;y2=x.(1/2) plot (x, yl, x, y2, linewidth', 2), hold on plot([-0.1,2],[0,0],’r',[0,0],[-0.1,1.5],’r3) axis([-0.1,1.4,-0.1,1.2]) legend(X, x 1/2')4 y1=x.^(-2);y2=x.^(-4); plot(x,y1,x,y2,'linewidth',2),hold on plot([-2,2],[0,0],'r',[0,0],[-500,500],'r') axis([-1,1,-20,500]); legend('x^-2','x^-4'); 幂函数 图象 (a9) clf,x=0:0.02:1.6; y1=x.^2;y2=x.^(1/2); plot(x,y1,x,y2,'linewidth',2),hold on plot([-0.1,2],[0,0],'r',[0,0],[-0.1,1.5],'r') axis([-0.1,1.4,-0.1,1.2]) legend('x^','x^1/2')