I have been trying to figure this one for quite some time now. I tried using the following formula: $x(k) \iff X(z) = \frac{z}{z-a}$ , when $|z|>|a|$
What is the z-transform of $x(k) =(-2)^k \cdot u(k+2)$?
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discrete-mathematics
z-transform
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0http://dsp.stackexchange.com – 2017-01-25
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0What is the function $u(k)$? – 2017-01-25