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UPSC NDA Math Model Paper 4

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Question : 4 of 120
 
Marks: +1, -0
What is the value of λ for which the vectors
^
i
−
^
j
+
^
k
,2
^
i
+
^
j
−
^
k
 ,
^
i
λ−
^
j
+
^
k
λ are coplanar
Validate
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