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Vector Algebra Part 1

Section: Mathematics
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Question : 30 of 100
 
Marks: +1, -0
If the vectors,
→
p
=(a+1)
^
i
+a
^
j
+a
^
k
,
→
q
=a
^
i
+(a+1)
^
j
+a
^
k
 and
→
r
=a
^
i
+a
^
j
+(a+1)
^
k
 (a ∈ R) are coplanar and 3(
→
p
.
→
q
)2−λ|
→
r
×
→
q
|2=0 , then the value of λ is ------.
[9 Jan 2020 Shift 1]
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