vectors-m

Question: ${{(\mathbf{r}\,.\,\mathbf{i})}^{2}}+{{(\mathbf{r}\,.\,\mathbf{j})}^{2}}+{{(\mathbf{r}\,.\,\mathbf{k})}^{2}}=$



1) $3{{r}^{2}}$
2) ${{r}^{2}}$
3) 0
4) None of these
Solution: Explanation: No Explanation
Scalar Product Dot Product

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