[" Be "(-1,-2,1)" ,directed from "A" the vector joining the points "A(1,2,-3)" and fiviliput "],[B(-1,-2,1)," directed from "A" to "B" ."],[" (1) Show that the vector "{+}+k" is equally inclined to the axes "0X," OY and "02" ."],[" 15.Find the position vector of a point "R" which divides the line incleates "]