If `(vec(a)-vec(b)).(vec(a)+vec(b))=27` and `|vec(a)|=2|vec(b)|` the find `|vec(a)|` and `|vec(b)|`.
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The correct Answer is:
`|vec(a)|=6,|vec(b)|=2`
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KUMAR PRAKASHAN-VECTOR ALGEBRA -Practice Paper - 10 (Section-D)
