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If the vectors `aoverset(^)i+overset(^)j+overset(^)k,overset(^)i+boverset(^)j+overset(^)k and overset(^)i+overset(^)j+coverset(^)k` are coplanar `(a ne b ne c ne 1)`, then the value of `abc-(a+b+c)=`

A

2

B

`-2`

C

0

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
B
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