... n=-n0:n0; u1=n>=0; u2=(n-2)>=0;x=u1-u2;h=(0.7).^n;h1=h.*u1; k1=-n0:n0; y=conv(x,h1); length_output=length(x)+length(h1 ) -1 ; k2=linspace (-2 *n0,2*n0,length_output);subplot(2 ,1, 2);stem(k1,x);xlabel('n'),ylabel('x(n)');grid;subplot(2 ,1, 2);stem(k1,h1);xlabel('n'),ylabel('h(n)');grid;subplot(2 ,1, 2);stem(k2,y);xlabel('n'),ylabel('y(n)');grid; ... Matlab.a.code:num= [1 0]; den= [1 -0 .7]; h=tf(num,den)Transfer function :- .ss 0 7b. Đáp ứng tần số biên độ.Code:[h w]=freqz( [1] , [1 -0 .7] ,10 24); phi =18 0*unwrap(angle(h))/pi; subplot(2 ,1, 1),plot(w,abs(h)),grid;xlabel('Frequancy(radian)'),ylabel('Magnitude');d.x(n)=δ(n-3)h(n)=0,7nu(n).code:h= [1 ... f.x(n)=0,5nu(n)h(n)=0,7nu(n)code:n0 =10 ; n=-n0:n0; u=n>=0; f= (1/ 2).^n; x=f.*u; f1=(0.7).^n; h=f1.*u; k1=-n0:n0; y=conv(x,h); length_output=length(x)+length(h ) -1 ; k2=linspace (-2 *n0,2*n0,length_output); subplot(2 ,1, 2);stem(k1,x);xlabel('n'),ylabel('x(n)');grid;subplot(2 ,1, 2);stem(k1,h);xlabel('n'),ylabel('h(n)');grid;subplot(2 ,1, 2);stem(k2,y);xlabel('n'),ylabel('y(n)');grid;...