1.

The points A(vec(a)),B(vec(b)) and C(vec( c )) are collinear then ………….

Answer»

`VEC(a)+vec(b)+vec( c )=vec(0)`
`vec(a)XX vec(b)+vec(b)xx vec( c )+vec( c )xx vec(a)=vec(0)`
`vec(a).vec(b)+vec(b).vec( c )+vec( c ).vec(a)=0`
None of these

ANSWER :B


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