UPSC NDA II 2013 Mathematics Paper

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Question : 52 of 120
 
Marks: +1, -0
The position vectors of the points A and B are respectively 3
∧
i
−5
∧
j
+2
∧
k
and
∧
i
+
∧
j
−
∧
k
. What is the length of AB ?
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