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If veca and vecb are non-collinear vecto...

If `veca and vecb` are non-collinear vectors, then the value of `x` for which vectors `vec alpha =(x-2)vec a +vec b and vec beta=(3+2x)vec a-2vec b` are collinear, is given by (i)`1/2` (ii)`1/4` (iii)`0` (iv)`-1`

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