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Mathematics
Problem
Identify the improper rational function among the following. a)
4
x
2
+
7
x
−
1
x
3
−
5
\dfrac{4x^{2}+7x-1}{x^{3}-5}
x
3
−
5
4
x
2
+
7
x
−
1
b)
3
x
3
−
2
x
+
5
x
2
−
1
\dfrac{3x^{3}-2x+5}{x^{2}-1}
x
2
−
1
3
x
3
−
2
x
+
5
c)
(
x
+
1
)
2
2
x
3
\dfrac{(x+1)^{2}}{2x^{3}}
2
x
3
(
x
+
1
)
2
d)
5
x
4
x
5
+
1
\dfrac{5x^{4}}{x^{5}+1}
x
5
+
1
5
x
4
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