IF the vectors a = hati + hatj + ha...

IF the vectors ` a = hati + hatj + hatk , b = hati - hatj + 2 hatk ` and `c= x hati +(x-2) hatj - hatk` are coplanar , then x=

A

1

B

2

C

0

D

`-2`

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The correct Answer is:

D

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