NCERT Exercise 10.2 Q15 - Vector Algebra
Question: Find the position vector of R dividing the join of P(i-hat+2j-hat-k-hat) and Q(-i-hat+j-hat+k-hat) in the ratio 2:1 (i) internally (ii) externally.
Answer: (i) (-i-hat + 4 j-hat + k-hat)/3; (ii) -3 i-hat + 3 k-hat.
Full step-by-step NCERT solution with diagrams on Something by Zero.