 
 
 
13.6.2  Inverse Z-transform of a rational function
The inverse Z-transform of a rational expression is
a formula for the general term of a sequence with the given rational
expression as its Z-transform.
The invztrans command finds
the inverse Z-transform of a rational expression.
- 
invztrans command takes one mandatory and two
optional arguments:
- 
rat, a rational expression.
- Optionally, x the variable (by default x).
- Optionally, n, a variable to be used by the result (by
default x).
 
- ztrans(rat ⟨,x,n ⟩)
returns the inverse Z-transform of rat.
Examples
since ztrans(1) yields x/x−1.
 
 
