PENILAIAN AKHIR SEMESTER GENAP
QUESTIONS 1. a=i-8j+5k b=3i+8j+2k C=-2i-4j+3k A+2b-3c = (1,-8, 5) + 2 (3,8,2) - 3 (-2,-4,3) = (1,-8,5) + (6,16,4) - (-6,-12,9) = 13i + 20j 2. (7,-4, p) x (1, 8, -5) = 0 7 + (-32) - 5p = 0 -25p = 5 p = -5 = a - b - c = (7,-4,-5) - (1,-8,-4) - (1,-2,-3) = (5,-10,-3) 3. PQ = Q - P = (-4, 1) x (9, 11) = ( -13, -10 ) QUESTIONS 2 4. AB = k × BC B - A = k × C - B (7, -14, 6) - (1, -5, -9) = k × (15, -26, 20) - (7, -14, 6 ) (6, -9, 15) = k × (...