Hãy chuyển X ( Z ) về dạng phân thức tối giản. X ( Z ) = Z 5 ( Z − 2 ) ( Z − 1 )

$X\left(Z\right)=\frac{2}{Z-2}-\frac{1}{Z-1}$

$\text{X}\left(\text{Z}\right)=\frac{2.Z{}^5}{Z-2}-\frac{Z{}^5}{Z-1}$

$X\left(Z\right)=Z{}^4\left|\frac{2}{Z-2}-\frac{1}{Z-1}\right|$

$\text{X}\left(\text{Z}\right)=\frac{Z{}^5}{Z-2}+\frac{Z{}^5}{Z-1}$