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UPSC NDA II 2013 Mathematics Paper

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Question : 55 of 120
 
Marks: +1, -0
If
→
a
=2
∧
i
+2
∧
j
+3
∧
k
,‌‌
→
b
=−
∧
i
+2
∧
j
+
∧
k
 and
→
c
=3
∧
i
+
∧
j
 are three vectors such that
→
a
+t
→
b
 is perpendicular to
→
c
, then what is t equal to?
Validate
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