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Vectors

Blazing goIITian

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18 Apr 2008 13:23:59 IST

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LET a ,b and c b three non-vectors no two of which are collinear, if a + 2b is collinear wit c and b+3c is collinear with a, then a+2b+6c=

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vinni

Cool goIITian

Joined: 28 Mar 2008

Posts: 40

18 Apr 2008 19:39:27 IST

Like 1 people liked this

a+2b=tc

b+3c=sa

b=sa-3c sub in 1st eq

=> a+2(sa-3c)=tc

a-6c=-2sa+tc

=>t=-6 sub in 1st eq

a+2b=-6c

a+2b+6c=0

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