If 4i + 7j + 8k, 2i + 3j + 4k, 2i + 5j + 7k are position vectors of A, B, C of `Delta` ABC then position vector of the point where the bisector of angle A meets BC is

If 4i+7j+8k , 2i+3j+4k and 2i+5j+7k are the position vectors of the vertices A,B and C of triangle ABC ,The position vector of the point where the bisector of /_A meets BC is

If 4vec i+7vec j+8vec k,2vec i+3vec j+4vec k and 2vec i+5vec j+7vec j are the position vectors of the vertices of A,B and C of a triangle ABC, then the position vector of the point where the bisector of /_A meets BC

If the position vectors of A, B are 2i - 9j - 4k, 6i - 3j + 8k then the unit vector in the direction of vec(A)B is

If A = i + 2j + 3k and B = 2i - j + 4k, then the position vectors of the points of trisection are

The position vector of a point laying on the line joining the points whose position vectors are i+j-k and i-j+k is