The sum of the distinct real values of ...

The sum of the distinct real values of mu for which the vectors, `muhat(i)+hat(j)+hat(k),hat(i)+muhat(j)+hat(k),hat(i)+hat(j)+muhat(k)` are co-planar is :

A

-1

B

0

C

1

D

2

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The correct Answer is:

A

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