JEE Main 7 Jan 2020 Shift 1 Solved Paper

Section: Mathematics
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Question : 64 of 75
 
Marks: +1, -0
A vector
→
a
=α
→
i
+2
→
j
+β
→
k
(α,β∈R) lies in the plane of the vectros
→
b
=
→
i
+
→
j
and
→
c
=
→
i
−
→
j
+4
→
k
. If
→
a
bisects the angle between
→
b
and
→
c
, then:
[7-Jan-2020 Shift 1]
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