Ответ:
(2AB+BC) = 2 * (-2; 3; 0) + (6; 2; 1) = (-4; 6; 0) + (6; 2; 1) = (2; 8; 1)
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Ответ:
(2AB+BC) = 2 * (-2; 3; 0) + (6; 2; 1) = (-4; 6; 0) + (6; 2; 1) = (2; 8; 1)