2a)
AB = B - A = [3, -1.5, -5]
CB = B - C = [2, 4.5, 2]
AB + CB = AB - CB = [3, -1.5, -5] - [2, 4.5, 2] = [1, -6, -7]
CA - CB = - AC - CB = - AB = [-3, 1.5, 5]
2b) A' = [3, 5, 7] + [6, -3, 2.5] = [9, 2, 9.5]
2c) D' = [8, 1, -9] - [6, -3, 2.5] = [2, 4, -11.5]
3a) Zwei Vektoren werden addiert indem ihre Komponenten einzeln addiert werden.
3b)
OA + OB = [3, 5, 7] + [6, 3.5, 2] = [9, 8.5, 9]
OC - OA = [4, -1, 0] - [3, 5, 7] = [1, -6, -7]
AB + v = [3, -1.5, -5] + [6, -3, 2.5] = [9, -4.5, -2.5]
4 * AB = 4 * [3, -1.5, -5] = [12, -6, -20]
2 * OB - 4 * v = 2 * [6, 3.5, 2] - 4 * [6, -3, 2.5] = [-12, 19, -6]
3c) -v = -[6, -3, 2.5] = [-6, 3, -2.5]