A) \[\sqrt{29}\]units
B) \[\sqrt{31}\] units
C) \[\sqrt{37}\]units
D) \[\sqrt{37}\] units
Correct Answer: A
Solution :
[a] \[\overrightarrow{v}=\left| \begin{matrix} {\hat{i}} & {\hat{j}} & {\hat{k}} \\ 1 & -2 & 2 \\ 0 & 4 & -3 \\ \end{matrix} \right|\] \[\overrightarrow{v}=\hat{i}[6-8]+\hat{j}[0+3]+\hat{k}[4-0]\] \[\overrightarrow{v}=-\,2\hat{i}+3\hat{j}+4\hat{k}\]\[\Rightarrow \]\[|\overrightarrow{v}|=\sqrt{29}\,\,units.\]You need to login to perform this action.
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