UPSC NDA I 2015 Mathematics Solved Paper

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Question : 104 of 120
 
Marks: +1, -0
If
→
a
+
→
b
+
→
c
=
→
0
,
then which of the following is/are correct?
1.
→
a
,
→
b
,
→
c
are co-planar
2.
→
a
×
→
b
=
→
b
×
→
c
=
→
c
×
→
a

Select the correct answer using the code given below.
[NDA I 2015]
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