A) \[\frac{1}{\sqrt{14}}\]
B) \[\frac{2}{\sqrt{14}}\]
C) \[\frac{3}{\sqrt{14}}\]
D) \[\sqrt{14}\]
Correct Answer: B
Solution :
\[(2\mathbf{i}+3\mathbf{j}-2\mathbf{k}).\frac{(\mathbf{i}+2\mathbf{j}+3\mathbf{k})}{\sqrt{14}}=\frac{2}{\sqrt{14}}.\]
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