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1. 2. Find the direction angles of the vector v = (-3, 5, -7). Which of the following is a unit vector? u = (2,

1. 2. Find the direction angles of the vector v = (-3, 5, -7). Which of the following is a unit vector? u = (2, 3, -1) V3 1 = 2 2 O A. O B. O A. W = (1, -1, 0) a = 3 O C. OD

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