Engineering Tables/Z Transform Properties


 * Initial value theorem
 * $$x[0]=\lim_{z\rightarrow \infty}X(z) \ $$, If $$x[n]\,$$ causal


 * Final value theorem
 * $$x[\infty]=\lim_{z\rightarrow 1}(z-1)X(z) \ $$, Only if poles of $$(z-1)X(z) \ $$	 are inside unit circle