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If two vector vec(a) and vec(b) are such...

If two vector `vec(a)` and `vec(b)` are such that `|vec(a)| = 3, |vec(b)| = 2` and `vec(a).vec(b) = 6` find `|vec(a) + vec(b)|` and `|vec(a) - vec(b)|`.

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The correct Answer is:
`|a - b| = 1`
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