1.

Show that the four points with position vectors bara,barb,barc,bard are coplaner if [barb barc bard]+[barc bara bard]+[bara barb bard]=[bara barb barc]

Answer»

`[[BARABARBBARC]`
`2[barabarbbarc]`
`3[barabarbbarc]`
0

Answer :A


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