Power series of $f(x)=\frac{1}{1+x+x^2+x^3}$
40464
Find series representation of a function $ y=\frac{1}{1+x+x^{2}+x^{3}} $
7201
Prove that $x_1^2+x_2^2+x_3^2=1$ yields $ \sum_{i=1}^{3}\frac{x_i}{1+x_i^2} \le \frac{3\sqrt{3}}{4} $
13248
How to obtain $f(x)$, if it is known that $f(f(x))=x^2+x$?
92754
Closed form for the series: $\sum_{n=1}^{\infty}x^{n^2}$
112089
Find the Maclaurin series of f(x)
70841
A simple series $\sum_{i=1}^\infty \frac{i}{2^i} = 2$
74664
A question regarding power series expansion of an entire function
131276
Maclaurin series of $\ln(1-x+x^2)$
21407
Every power series is the Taylor series of some $C^{\infty}$ function
126762
taylor series of $\ln(1+x)$?
135032
Nature of the series $\sum\limits_{n=3}^{\infty} \frac{1}{(\log\log n)^{\log n}}$
95175
Derive the generating function: $\frac1{(1-x)^3}= \sum_{n=0}^\infty \binom{n+2}{2}x^n$
74692
Simple Power Series Expansion for Problems similar to $f = (1 + \epsilon \,x)^{1/\epsilon}$
124440
Evaluate this power series
19355
prove $f(x)=x^3+x$ is one to one and onto
134181
What is the $n$ times iterate of $f(x)=\frac{x}{\sqrt{1+x^2}}$?
144539
Power series $ f(g(z)) = z $