1.

If vec(i), vec(j), vec(k) is an orthonomal system of vectors, vec(a) is a vector and vec(a) xx vec(i) + 2vec(a)- 5vec(j)=vec(0) then vec(a)=

Answer»

`2vec(J) + VEC(K)`
`2vec(j)-vec(k)`
`2vec(i) + vec(j)`
`2vec(i) + vec(j)`

ANSWER :A


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