... ChÝnh_B1K520510 -1 00100510 -1 00100510 -1 0010 -1 0 -5 0510 -1 0 -5 0510 -1 01De 5%phan a,b [x,y]=meshgrid(linspace (-0 .5,0.5),linspace (-2 ,2)); f1=cos(x.^2) +3.*y.*sin(2.*x )-2 .*x-0.3; f2=x.^4+2.*x.*y+y.^2+8.*x+y-2; ... [x0,fx0,n,xn,fxn]=bai7(0,5,'exp(-x)-sin(x^2 )-0 .5','-exp(-x )-2 *cos(x^2)*x',1e-10) Bai 8close all;clc [x,y]=meshgrid (-2 :.2:2,0:.2:2); z1=(x.^2).*sin(y)+cos(2*x).*y-0.5; z2=(2.^x).*y-x.*(y.^2 )-1 ; contour(x,y,z1,[0 ... z=8./(x.^4+y.^4+2.*x+2.*y+4)-exp(-x.^2-y.^2+x+y+1); end De 2%giong bai 1%thiet lap luoi chia 31x31[x,y]=meshgrid(linspace (-2 ,2,31)); z=(x.^ 2-2 ).*exp(-x.^2-y.^2)+2./(x.^2+y.^ 2-2 .*(x+y)+3); %tim...