... subplot(2,1,2);stem(0:10,x);xlabel('n'),ylabel('x(n)');y=conv(x,h);subplot(2,1,2);stem(y);xlabel('n'),ylabel('y(n)');e.x(n)=u(n)-u(n-2)h(n)=0,7nu(n).code:n0=10; 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; ... Lập trình 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],1024); phi=180*unwrap(angle(h))/pi; ... 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);...