1. 代码 for alpha=0:0.1:30x=-1.8:0.001:1.8;y=(x.^2).^(1/3)+0.9*(3.3-x.^2).^(1/2).*sin(alpha*pi*x);plot(x,y,'r-','LineWidth',1.2);set(gca,'YGrid','on');axis([-3,3,-2,4]);text(-2,3.35,'$f(x)=x^{\fr
import numpy as npimport matplotlib.pyplot as pltX=np.arange(-1.5,1.5,0.05)Y=np.arange(-1,1.5,0.05)plt.title('Introduction', fontsize=20)x,y=np.meshgrid(X,Y)# f=17*x**2-16*np.abs(x)*y+17*y**2-225f