Hãy xác định Y ( Z ) = Z T [ y ( n ) ] .Nếu Z T [ x ( n ) ] = X ( Z ) và y ( n ) = a n ⋅ x ( n )

$\text{Y}\left(\text{Z}\right)=X\left(\underset{a}{\left(Z\right)}\right)$

$Y\left(Z\right)=\frac{X\left(Z\right)}{a}$

$Y\left(Z\right)=a{}^n.X\left(Z\right)$

$Y\left(Z\right)=X\left(aZ\right)$