vectors-m

Question: If $a\,.\,i=a\,.\,(\hat{i}+\hat{j})=a\,.\,(\hat{i}+\hat{j}+\hat{k})$, then $\vec{a} =$



1) $\hat{i}$
2) $\hat{k}$
3) $\hat{j}$
4) $\hat{i} + \hat{j} + \hat{k}$
Solution: Explanation: No Explanation
Scalar Product Dot Product

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