UPSC NDA 2 2017 Mathematics Solved Paper

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Question : 45 of 120
 
Marks: +1, -0
Let
α
+
i
+2
j
k
,
β
=2
i
j
+3
k
be three vectors. If
α
and
β
are both perpendicular to the vector
δ
and
δ
.
γ
=10
, then what is the magnitude of
δ
?
[NDA II 2017]
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