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12 problems: (1-2) Find magnitude: |(3,-4)|, |(1,2,-2)|. (3-4) Add/subtract: (2,5)+(-1,3), (4,1,6)-(2,3,1). (5-6) Scalar multiple: 3·(2,-1), -2·(1,4,-3). (7-8) Dot product: (1,2)·(3,-1), (2,1,3)·(1,-2,1). (9) Find angle between (1,0) and (1,1) using dot product. (10) Are (2,3) and (6,-4) perpendicul

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