InverseZTransform

InverseZTransform[expr, z, n] gives the inverse Z transform of expr.

Examples

Inverse Z transform:

InverseZTransform[z/(z - a), z, n]
(* a^n *)

Round-trip:

InverseZTransform[ZTransform[f[n], n, z], z, n]
(* f[n] *)

Please visit the official Wolfram Language Reference for more details.