UPSC NDA 2 2017 Mathematics Solved Paper

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Question : 51 of 120

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]

0
1
a+b+c
abc

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