The right-sided exponential sequence can be determined mathematically as
This sequence exists for positive values of n.
Fig. 6.1 shows the plot of this sequence.
Fig. 6.1 Plot of x(n) = anu(n)
The z-transform of x(n) is given by
Here x(n) = an for n ≥ 0 and hence the above equation becomes
Expanding the above equation we can write
X(z) will converge for | az−1 | ...