Mathematics Part-II

Book: Mathematics Part-II

Chapter: 10. Vector Algebra

Subject: Maths - Class 12th

Q. No. 15 of Exercise 10.2

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15

Find the position vector of a point R which divides the line joining two points P and Q whose position vectors are respectively, in the ratio 2 : 1

(i) internally (ii) externally

Given that and


(i) The lies on the segment PQ(internal division).If m:n is the ratio in which divides PQ, then



Given m:n=2:1, m=2 and n=1



(ii) The does not lie on the segment PQ(external division).If m:n is the ratio in which divides PQ,then



Given m:n=2:1, m=2 and n=1



15

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