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JEE Main 28 June 2022 Shift 2 Solved Paper

Section: Mathematics
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Question : 14 of 90
 
Marks: +1, -0
Let
→
a
=α
^
i
+2
^
j
−
^
k
 and
→
b
=−2
^
i
+α
^
j
+
^
k
, where α∈R. If the area of the parallelogram whose adjacent sides are represented by the vectors
→
a
 and
→
b
 is √15(α2+4), then the value of 2|
→
a
|2+(
→
a
â‹…
→
b
)|
→
b
|2 is equal to :
[28-Jun-2022-Shift-2]
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