1.

If vectors vecA and vecB are 3i-4j+5k and 2i + 3j - 4k and 2hat(i)+3hat(j)-4hat(k) respectively find the unit vector parallel to vecA + vecB

Answer»

`(5i-j+k)/(SQRT(27))`
`(5i+j+k)/(sqrt(27))`
`(5i+j+k)/(27)`
`(5i-j-k)/(27)`

ANSWER :A


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