1.

If the position vectors of the points A and B are \[c=(2\,-2,\,4)\] and \[3\mathbf{i}-\mathbf{j}-3\mathbf{k},\] then what will be the position vector of the mid-point of AB                                                                                              [MP PET 1992]

A. \[\mathbf{i}+2\mathbf{j}-\mathbf{k}\]            
B. \[2\mathbf{i}+\mathbf{j}-2\mathbf{k}\]
C. \[2\mathbf{i}+\mathbf{j}-\mathbf{k}\]            
D. \[\mathbf{i}+\mathbf{j}-2\mathbf{k}\]
Answer» C. \[2\mathbf{i}+\mathbf{j}-\mathbf{k}\]            


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