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Question number 7. Set a = (-1, -3, -2), b = (-1, 0, 4), c = (3, 3, -5). Find: -4a + b - 3c.

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Question number 7. Set a = (-1, -3, -2), b = (-1, 0, 4), c = (3, 3, -5). Find: -4a + b - 3c. O (-6, 3, 27) O (12, 3, 19) O (12, 21, -3) O (-6, 3, 19) O (-6, 9, 27) Question number 8. Find the unit vector in the direction of a = 2i + 5j + k. 32 64 Oitj+k 2 5 + 30 130 O + 15 30 I cn O + + kQuestion number 5. Describe the region 2 = {(x, y, 2) | x2 + y'

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