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High school solutions, please. 3. a) Given the vectors a = [3,-2], b = [k, 5], determine all values of k for which: ath =

High school solutions, please.

3. a) Given the vectors a = [3,-2], b = [k, 5], determine all values of k for which: ath = 6 b) Given |u| = 12, [v| = 18, |u + v) = 23, determine |u - ul

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