NDA Math Vector Algebra

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Question : 55 of 101
 
Marks: +1, -0
If the vector a
⋀
i
+
⋀
j
+
⋀
k
,
⋀
i
+b
⋀
j
+
⋀
k
and
⋀
i
+
⋀
j
=c
⋀
k
(a,b,c≠1)
are co-planar, then the value of ‌‌
1
1−a
+‌‌
1
1−b
+‌‌
1
1−c
is equal to
[NDA II 2017]
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