vectors-m

Question: $a,\,b,\,c$ are three vectors, such that $a+b+c=0$, $|a|\,=1,\,|b|\,=2,\,|c|\,=3$, then $a.b+b.c+c.a$ is equal to



1) 0
2) – 7
3) 7
4) 1
Solution: Explanation: No Explanation
Scalar Product Dot Product

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