Odpowiedzi

Najlepsza Odpowiedź!
  • Roma
  • Community Manager
2010-01-14T23:44:13+01:00
A)
A = (-2, 4)
B = (3, -5)

AB = [3 + 2, -5 - 4] = [5, -9]

|AB| = √5² + (-9)² = √25 + 81 = √106

b)

AB = [-2, 4]
A = (x, y)
B = (-2, 2)
-2 = -2 - x
x = -2 + 2
x = 0
4 = 2 - y
y = 2 - 4
y = - 2
A = (0, -2)