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vec OA = i+xj+2k, vec OB = 2i+k and vec ...

`vec OA = i+xj+2k, vec OB = 2i+k` and `vec OC =-i+j+k` and `vec AB` is perpendicular to `vec BC`,then x =

A

0

B

3

C

- 3

D

none of these

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The correct Answer is:
C
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