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Mathematics
Problem
The Maclaurin series
x
−
x
2
2
+
x
3
3
−
x
4
4
+
…
x-\dfrac{x^{2}}{2}+\dfrac{x^{3}}{3}-\dfrac{x^{4}}{4}+\dots
x
−
2
x
2
+
3
x
3
−
4
x
4
+
…
represents which of the following functions on
(
−
1
,
1
]
(-1,1]
(
−
1
,
1
]
? a)
−
ln
(
1
−
x
)
-\ln(1-x)
−
ln
(
1
−
x
)
b)
x
1
+
x
\dfrac{x}{1+x}
1
+
x
x
c)
ln
(
1
+
x
)
\ln(1+x)
ln
(
1
+
x
)
d)
arctan
x
\arctan x
arctan
x
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