1. 다음에서 u.v를 구하여라. (4) u (7, 6, 2) v (3, 1, 2) s (1) u = (4, 7,-1) v = (-2, 1, 4) (2) u = (-1, -2, -3) v = (2, 8, -6) (3) u = (1, -1, 1) v = (T, 27, 3T)

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