Find the unit vector in the direction of...

Find the unit vector in the direction of the sum of the vectors
`bar(a) = 2bar(i)+ 2bar(j) - 5bar(k) and bar(b) = 2bar(i) + bar(j) + 3bar(k)`.

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The correct Answer is:

`(4 i + 3 j - 2k)/( sqrt(29))`

ADDITION OF VECTORS
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ADDITION OF VECTORS
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