The - transform of a systerm is If the ROC is || < 0.2, then the impluse response of the system is

The - transform of a systerm is If the ROC is || < 0.2, then the impl

1.	The - transform of a systerm is If the ROC is \|\| < 0.2, then the impluse response of the system is
Answer» ROC is \|z\| < 0.2, which shows x(n) must be non-causal, therefore sequence must be left handed. But given is z-transform of right handed sequence. But if H(z) become then ROC become \|z\| < 0.2 and inverse z-transform of is - (0.2)n ∪(- n - 1).