Question

if A is (2,-1,4) B(3,2,5) and C(5,8,7) show that the vectors AB and AC are collinear​

Answer 1

Answer:

Hence proved

Step-by-step explanation:

AB = √{(3-2)² +(2+1)² +(5-4)² = √11

BC = √{(5-3)² +(8-2)² +(7-5)² = 2√11

AC = √{(5-2)² +(8+1)² +(7-4)² = 3√11

since AC = -CA

therefore CA = -3√11

since

CA = -3 AB = -2 BC

therefore a b and c are collinear