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If |vec a| = 3, |vec b| = 5, and |vec c|...

If `|vec a| = 3, |vec b| = 5, and |vec c| = 4` and `vec a + vec b + vec c = vec O` then the value of `(vec a . vec b + vec b . vec c + vec c .vec a ) =`

A

0

B

-25

C

25

D

none of these

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B
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HIMALAYA PUBLICATION-VECTORS AND THEIR APPLICATIONS-QUESTION BANK
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