A) \[4\hat{i}+2\hat{j}+5\hat{k}\]
B) \[-4\hat{i}-2\hat{j}+5\hat{k}\]
C) \[3\hat{i}+4\hat{j}+5\hat{k}\]
D) Null vector
Correct Answer: B
Solution :
Let the desired vector be\[\vec{x}.\] \[\hat{i}-3j+2\hat{k}+3\hat{i}+6\hat{j}-7\hat{k}+\vec{x}=\hat{j}\]or \[4\hat{i}+3\hat{j}-5\hat{k}+\vec{x}=\hat{j}\] or, \[\vec{x}=-4\hat{i}-2\hat{j}+5\hat{k}\] Hence, the correction option is (b).You need to login to perform this action.
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