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KEAM 2014 Math Paper

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Question : 4 of 120
 
Marks: +1, -0
Let
→
a
=
⋀
i
−2
⋀
j
+3
⋀
k
. If
→
b
 is a vector such that
→
a
.
→
b
=|
→
b
|2 and |
→
a
−
→
b
|=√7, then |
→
b
|=
Validate
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