1.

If the ROC of X(z) is r1<|z|<r2, then what is the ROC of X(a-1z)?

A. |a|r<sub>1</sub>&lt;|z|&lt;|a|r<sub>2</sub>
B. |a|r<sub>1</sub>&gt;|z|&gt;|a|r<sub>2</sub>
C. |a|r<sub>1</sub>&lt;|z|&gt;|a|r<sub>2</sub>
D. |a|r<sub>1</sub>&gt;|z|&lt;|a|r<sub>2</sub>
Answer» B. |a|r<sub>1</sub>&gt;|z|&gt;|a|r<sub>2</sub>


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