Consider the sequence \(\rm x[n] = a^nu[n] +b^nu [n]\), where \(\rm u[ – McqOptions

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1.	Consider the sequence \(\rm x[n] = a^nu[n] +b^nu [n]\), where \(\rm u[n]\) denotes the unit-step sequence and \(\rm 0 < \|a\| < \|b\| < 1\). The region of convergence (ROC) of the z-transform of \(\rm u[n]\) is
A.	\(\rm \|z\| > \|a\|\)
B.	\(\rm \|z\| > \|b\|\)
C.	\(\rm \|z\| < \|a\|\)
D.	\(\rm \|a\| < \|z\| < \|b\|\)
Answer» C. \(\rm \|z\| < \|a\|\)

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