A) \[4\widehat{i}-2\widehat{j}+5\widehat{k~}~~\]
B) \[-\,4\widehat{i}-2\widehat{j}+5\widehat{k~}~~\]
C) \[3\widehat{i}-4\widehat{j}+5\widehat{k~}~~\]
D) Null vector
Correct Answer: B
Solution :
[b] Unit vector along y axis =\[\hat{j}\], so the required vector \[=\hat{j}-\left[ \left( \hat{i}-3\hat{j}+2\hat{k} \right)+\left( 3\hat{i}+6\hat{j}-7\hat{k} \right) \right]\] \[=-\,4\,\hat{i}-2\hat{j}+5\hat{k}\]You need to login to perform this action.
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