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JEEMAIN and NEET
>>
JEEMAIN PAST PAPERS
>>
2018
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Q)
Let
→
u
be a vector coplanar with the vectors
→
a
=
2
ˆ
i
+
3
ˆ
j
−
ˆ
k
and
→
b
=
ˆ
j
+
ˆ
k
. If
→
u
is perpendicular to and
→
a
and
→
u
→
b
=
24
, then
|
→
u
|
2
is equal to :
( A ) 84
( B ) 256
( C ) 315
( D ) 336
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