A) \[\frac{1}{2}\,(\mathbf{p}+\mathbf{q}-2\mathbf{r})\]
B) \[\frac{1}{2}(\mathbf{p}+\mathbf{q}+\mathbf{r})\]
C) \[\frac{1}{3}(\mathbf{p}+\mathbf{q}+\mathbf{r})\]
D) \[\frac{1}{3}(2\mathbf{p}+\mathbf{q}-\mathbf{r})\]
Correct Answer: B
Solution :
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