Cho hệ thống tuyến tính bất biến: Biết y ( n ) = 0 với n < 0 . Tìm h ( n ) ?

$\text{h}\left(\text{n}\right)=0,3{}^{\text{n}}\cdot \text{u}\left(\text{n}\right)$.

$\text{h}\left(\text{n}\right)=0,2{}^{\text{n}}\cdot \text{u}\left(\text{n}\right)$.

$\text{h}\left(\text{n}\right)=0,4{}^{\text{n}}\cdot \text{u}\left(\text{n}\right)$.

$\text{h}\left(\text{n}\right)=0,5{}^{\text{n}}\cdot \text{u}\left(\text{n}\right)$.