km, k=1 m = 0, 1, 2 or 3 (these identities were discussed in class and also appear in the textbook), to evaluate the following sum: (k-9)(1-(k-10)²) Use the properties of sigma notation and the identities for 100 k=9 n where Explicitly state all identities that you are using and note that you do not need to simplify your final answer to a single number: for example, expressions like

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