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If vectors ahat(i)+hat(j)+hat(k),hat(i)+...

If vectors `ahat(i)+hat(j)+hat(k),hat(i)+bhat(j)+hat(k),hat(i)+hat(j)+chat(k)` are coplanar, then `a+b+c-abc= . . . . . . . .`

A

`-2`

B

`-1`

C

2

D

1

Text Solution

Verified by Experts

The correct Answer is:
C
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