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Given a=i+j-k, b=-i+2j+k" and "c=-i+2j-k...

Given `a=i+j-k, b=-i+2j+k" and "c=-i+2j-k`. A unit vector perpendicular to both a + b and b + c is

A

i

B

j

C

k

D

`(i+j+k)/(sqrt3)`

Text Solution

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The correct Answer is:
C
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