Tìm h ( n ) của hệ thống được mô tả bởi phương trình sai phân sau: y ( n ) = 3 y ( n − 1 ) − 2 y ( n − 2 ) + x ( n ) + x ( n − 1 )

$\text{h}\left(\text{n}\right)=3.2{}^{\text{n}}.\text{U}\left(\text{n}\right)-2.\text{U}\left(\text{n}\right)$

$\text{h}\left(\text{n}\right)=2.2{}^{\text{n}}.\text{U}\left(\text{n}\right)-3.\text{U}\left(\text{n}\right)$

$h\left(n\right)=-3.2{}^n\cdot U\left(n\right)+2.U\left(n\right)$

$h\left(n\right)=3.2{}^n\cdot U\left(n\right)+2.U\left(n\right)$