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Find the position vector of a point R wh...

Find the position vector of a point R which divides the line joining the points P and Q whose vectors `i+2j-k` and `-i+j+k` in the ratio `2:1`
externally.

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p.v.of R =`vec(OR)`
` =(2(-overset^^i+overset^^j+overset^^k)-1(overset^^i+2overset^^j-overset^^k))/(2-1)`
`-3overset^^i+3overset^^k`
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A N EXCEL PUBLICATION-VECTOR ALGEBRA-QUESTION BANK
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