Knowledge/Understanding Multiple Choice: [10 Marks] 1. If u = [2, 3, 4] and v = [-7,-6, -5] find 2u - 30 a) [9, 9, 9] b) [-17, -12, -7] c) [25, 24, 23] d) [25, -12, 9] 2. If u = [2, 3, 4] and v = [-7, -6, -5] find | 2u - 3v + 5j | a) v2525 b) V1995 c) V625 d) v588 3. If u = [2, 3, 4] and D = [-7, -6, -5] find u . B a) [-14, -18, -20] b) -27 c) [-9, -9, -9] d) -52 4. If u = [2, 3, 4] and v = [-7, -6, -5] find w orthogonal to both u & v a) [9, -18, 9] b) V486 c) [-14, -18, -20] d) [9, 9, 9] 5. If lu = 4, |v|= 7 and the angle between these vectors is 1470 then u . v is: a) 15.2 b) 23.5 c) -15.2 d) -23.5 6. If Ju = 4, v = 7 and the angle between these vectors is 1470 then u X u is: a) 15.2 b) 23.5n c) 15.2n d) -23.5 7. Simplify: 3u + 4v - 8(u - 2 ) a) -5u + 20 b) -5u + 20D c) 4u + 20 d) -5u + 60