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Three points having position vectors bar...

Three points having position vectors `bara,barb and barc` will be collinear if

A

`lamdabara+mubarb=(lamda+mu)barc`

B

`[bara barb barc]=0`

C

`bara times barb+barb times barc+barc times bara=0`

D

`bar a times barc=barb`

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The correct Answer is:
A, C
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