vectors-m

Question: The vector $2\,\mathbf{i}+a\,\mathbf{j}+\mathbf{k}$ is perpendicular to the vector $2\,\mathbf{i}-\mathbf{j}-k,$ if $a=$



1) 5
2) – 5
3) – 3
4) 3
Solution: Explanation: No Explanation
Scalar Product Dot Product

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