A) 0
B) 2
C) 2
D) Any real number
Correct Answer: D
Solution :
\[(\mathbf{a}-\mathbf{b})-(\mathbf{a}+\mathbf{b})=\left[ (\mathbf{a}+k\mathbf{b})-(\mathbf{a}-\mathbf{b}) \right]\] \[\Rightarrow -2\mathbf{b}=(k+1)\mathbf{b}\]. Hence \[k\in R.\]You need to login to perform this action.
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