43. Lex \(x[n]=({1\over {-9}})^nu(n)-(-{1\over...

43. Lex \(x[n]=({1\over {-9}})^nu(n)-(-{1\over 3})^nu(-n-1)\). The Region of Convergence (ROC) of the z-transform of x[n]
 

(C) is \(1\over3\)>|z|>\(1\over9\)

(B) is |z|<\(1\over3\)

(D)  does not exist.

(A) is |z|>\(1\over9\)

Hint: 

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