1.

Find the position vector of a point R which divides the line joining two points P and Q whose position vectors are hat i + 2 hat j - hat k and - hat i + hat j + hat k respectively, in the ratio 2 : 1 (i) internally (ii) externally

Answer»


Answer :(i) `-(1)/(3)HATI+(4)/(3)HATJ+(1)/(3)HATK`
(II) `-3hati+3hatk`


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