19. a and b are two vectors and a = 3. Find the value of a + b when: a) b = 2a b) b = -3a c) b is perpendicular to a and b = 4,

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02-11-2022
Mathematics

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19. a and b are two vectors and a = 3. Find the value of a + b when: a) b = 2a b) b = -3a c) b is perpendicular to a and b = 4,

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