vectors

Question: What vector must be added to the two vectors $\hat i - 2\hat j + 2\hat k$ and $2\hat i + \hat j - \hat k,$ so that the resultant may be a unit vector along x-axis



1) $2\hat i + \hat j - \hat k$
2) $ - 2\hat i + \hat j - \hat k$
3) $2\hat i - \hat j + \hat k$
4) $ - 2\hat i - \hat j - \hat k$
Solution: Explanation: Explanation
addition-subtraction-vectors

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