TS EAMCET 2017 Code A Solved Paper

Section: Mathematics
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Question : 57 of 160
 
Marks: +1, -0
If the vectors
a
=
i
+
j
+
k
,
b
=
i
j
+2
k
and
c
=x
i
+(x2)
j
k
are coplanar, then x =
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