第17次课的分组讨论练答案1、x1(n)={−1,1,0,2↑,1,0,−1}x2(n)={1,2,3↑,−1,−1,−1,−1}(1)y1(n)=x1(n)+x2(n)y1(n)={−1,2,2,5,0,−1↑,−2,−1}2、y2(n)=x1(n+1)+x2(−n)y2(n)={−2,0,−1,1,4,2,0,0↑}y3(n)=x1(n)−x2(n−1)y3(n)={−1,1,−1,0↑,−2,1,0,1,1}3、y(n)+2y(n−1)+y(n−2)=x(n)+x(n−1)H(E)=(1+E−1)y1(n)(1+2E−1+E−2)y1(n)=y(n)x(n)y(n)=y1(n)+y1(n−1)x(n)=y1(n)+2y1(n−1)+y1(n−2) 2024-04-1201.13 MB3页
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