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If vectors vecA and vecB are 3 ha...

If vectors ` vecA and vecB ` are ` 3 hati - 4 hatj + 5 hatk ` and ` 2 hati + 3 hatj - 4hatk` respectively then the unit vector parallel to ` vecA + vecB `

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`((5 I -j+ k ) )/( sqrt(27))`
[ hint : `( vecA + vecB)/(| vecA + vecB|)`]
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