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Consider the two vectors in IR3: u = (-4, -20, -12) and v = (4, c, 12) where c is an unknown. (a) For what

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Consider the two vectors in IR3: u = (-4, -20, -12) and v = (4, c, 12) where c is an unknown. (a) For what value of c are u and @ collinear? Answer c = Number (b) For what value of c are u and @ orthogonal? Answer. c = Number FORMATTING: Give exact answers, not decimal approximations. To enter fractions like type 1/2

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