A) \[-\,2\mathbf{i}-4\mathbf{j}+2\mathbf{k}\]
B) \[-2\mathbf{i}+4\mathbf{j}-2\mathbf{k}\]
C) \[2\mathbf{i}+4\mathbf{j}-2\mathbf{k}\]
D) None of these
Correct Answer: A
Solution :
Let \[\mathbf{b}\] should be added, then \[\mathbf{a}+\mathbf{b}=\mathbf{i}\] \[\Rightarrow \mathbf{b}=\mathbf{i}-\mathbf{a}=\mathbf{i}-(3\mathbf{i}+4\mathbf{j}-2\mathbf{k})=-2\mathbf{i}-4\mathbf{j}+2\mathbf{k}.\]You need to login to perform this action.
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