The vectors \[(2\hat{i}-m\hat{j}+3m\hat{k})\And \]\[\{(1+m)\hat{i}-3m\hat{j}+\hat{k}\}\] include an acute angle for

\[m\in \left[ -2,-\frac{1}{2} \right]\]

The vectors \[(2\hat{i}-m\hat{j}+3m\hat{k})\And \]\[\{(1+m)\hat{i}-3m\

1.	The vectors \[(2\hat{i}-m\hat{j}+3m\hat{k})\And \]\[\{(1+m)\hat{i}-3m\hat{j}+\hat{k}\}\] include an acute angle for
A.	All values of m
B.	\[m<-2\]or \[m>-1/2\]
C.	\[m=-1/2\]
D.	\[m\in \left[ -2,-\frac{1}{2} \right]\]
Answer» C. \[m=-1/2\]

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The vectors \[(2\hat{i}-m\hat{j}+3m\hat{k})\And \]\[\{(1+m)\hat{i}-3m\hat{j}+\hat{k}\}\] include an acute angle for

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