1.

If vec(r ) xx vec(a) = vec(b) xx vec(a), vec(r ) xx vec(b) = vec(a) xx vec(b), vec(a) ne vec(0), vec(b) ne vec(0), vec(a) ne lamda vec(b) and vec(a) is not perpendicular to vec(b), then vec(r )=

Answer»

`VEC(a) - vec(B)`
`vec(a) + vec(b)`
`(vec(a) XX vec(b)) + vec(a)`
`(vec(a) xx vec(b)) + vec(b)`

ANSWER :B


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