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If vectors A and B be respectively equal...

If vectors A and B be respectively equal to `3hati - 4hatj + 5hatk and 2hati + 3hatj - 4hatk.` Find the unit vector parallel to A + B

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`hatn=(vecA+vecB)/(|vecA+vecB|)=((3hati-4hatj+5hatk)+(2hati+3hatj-4hatk))/(5hati-hatj+hatk)`
`=((5hati-hatj+hatk))/sqrt(27)`
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