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Unformatted text preview: - = = n k n n u ] [ ] [ . Thus the step function is express as a running sum. How to interpret this sum? Summary of relationship between [ n ] and u [ n ]: n [ n ] 1 n n 1 [ n-n ] n u [ n ] 1 -1 k 1 2 k k ] 1 [ ] [ ] [--= n u n u n - = = n k k n u ] [ ] [ backward difference running sum...
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- Spring '07