UPSEE 2018 Solved Paper

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Question : 117 of 150

Marks: +1, -0

If the vectors a

^

i

+a

^

j

+c

^

k

,

^

i

+

^

k

and c

^

i

+c

^

j

+b

^

k

are coplanar, then

c2=ab
b2=ac
a+c=2b
1
a
+
1
c
=
2
b

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