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2014-09-02T15:30:41-03:00
A) u.v (-3, -8, -1) = -12


b) (3, 2, 1) + (-2, -8,-2) . ( 9, 6, 1) - ( -1, -4, -1)
(1, -6, -1). (10, 10,2)
(10,-60,-2) = 52

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