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UPSC NDA II 2018 Mathematics Solved Paper
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© examsnet.com
Question : 3
Total: 120
Consider the following expressions:
1.
x
+
x
2
−
1
x
2.
√
a
x
2
+
b
x
+
x
−
c
+
d
c
−
e
x
2
3.
3
x
2
−
5
x
+
a
b
4.
2
x
2
−
a
x
+
b
3
5.
1
x
−
2
x
+
5
Which of the above are rational expressions?
[NDA II 2018]
1, 4 and 5 only
1, 3, 4 and 5 only
2, 4 and 5 only
1 and 2 only
Validate
Solution:
👈: Video Solution
By definition of rational function.
Option (A) is correct.
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