Rearranging the alternating harmonic series and finding differences in its sum
122534
Show that $\sum (-1)^{n+1}/n$ = $k$ can be expanded to a sum with $ 1 - 1/2 + 1/3 + 1/5 - 1/4 +1/7 + 1/9 - 1/6 + ....$ which is $3k/2$
34590
Fourier series of Log sine and Log cos
151477
computing the series $\sum_{n=1}^\infty \frac{1}{n^2 2^n}$
18064
Sum of reciprocals of numbers with certain terms omitted
112491
Finding counterexamples for infinite series.
108461
Sum of Harmonic Numbers
94902
Simplifying a geometric sum
73258
Power series summation
91744
Proving sum of sines is periodic when ratio of their frequencies is rational using differentation
34386
Sum of a complex, finite geometric series and its identity
151189
calculate the sum of an infinite series
96585
Sums and permutation
110585
Rearranging infinite series
118436
Identifying the series $\sum\limits_{k=-\infty}^{\infty} 2^k x^{2^k}$
54374
Alternating Series Using Other Roots of Unity
80467
My proof that a harmonic series diverges..
20471
Evaluating a slow sum