Question

What is vector joining the points (1,2,-1)&(-1,-1,-2)

Answer 1

Heya,

Let the (1,2,-1) and (-1,-1,-2) be point A and B respectively.

Position vector of A = i +2j - 1k

Position vector of B = -1i - 1j -2k

Thus,

Vector AB = position vector of point B - Position vector of point A.

= -1i - 1j -2k - (i +2j - 1k)

= -2i -3j -k Answer

Regards

Kshitij