If is a nonzero vector of magnitude ‘a’ and λ a nonzero scalar, then is unit vector if

16

Show that the points A(1, 2, 7), B(2, 6, 3) and C(3, 10, –1) are collinear.

17

Show that the vectors form the vertices of a right angled triangle.

1

Find if

2

Find a unit vector perpendicular to each of the vector