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JEEMAIN and NEET
>>
JEEMAIN PAST PAPERS
>>
2015
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Q)
Let
→
a
and
→
b
be two unit vectors such that
|
→
a
+
→
b
|
=
√
3
. If
→
c
=
→
a
+
2
→
b
+
3
(
→
a
×
→
b
)
2
, then
2
|
→
c
|
is equal to:
( A )
√
37
( B )
√
51
( C )
√
55
( D )
√
43
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