1.

a, b, c are three vectors such that |a| = 1, |b| = 2, |c| = 3 and b, c are perpendicular. If projection of b on a is the same as the projection of c on a, then |a-b + c| =

Answer»

`SQRT2`
`SQRT7`
`SQRT14`
`sqrt21`

ANSWER :A


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