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UPSC NDA I 2012 Mathematics Paper
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© examsnet.com
Question : 17
Total: 120
If
p
,
q
,
r
are in
AP
as well as GP, then which one of the following is correct?
p
=
q
≠
r
p
≠
q
≠
r
p
≠
q
=
r
p
=
q
=
r
Validate
Solution:
AB
=
√
(
0
+
4
)
2
+
(
−
1
−
2
)
2
=
√
16
+
9
=
5
BC
=
√
9
+
16
=
5
CA
=
√
49
+
(
1
)
2
=
√
50
=
5
√
2
=
10
+
5
√
2
=
5
(
2
+
√
2
)
© examsnet.com
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