Expressing the sign pattern $+--++--+\cdots$ in a series
31918
How do you create an alternating series with the sign being the same twice in a row?
69045
Solving this summation: $\sum_{i=1}^k i\cdot2^i$
128608
Closed form for the series $a+a^p+(a^p)^p+\dots$
65249
An interesting exercise about converging positive series, involving $\sum_{n\geq 1}a_n^{\frac{n-1}{n}}$
54374
Alternating Series Using Other Roots of Unity
98913
Sign in $\Delta U= -\int\vec{F}\cdot d\vec{l}$
137507
triangular series and inequality
101011
An intriguing relation between two alternating series
71824
Finding the sum of the series $\frac{1}{1!}+\frac{1+2}{2!}+\frac{1+2+3}{3!}+ \ldots$
28912
Does this series diverge: $(\sqrt 2-\sqrt 1)+(\sqrt 3-\sqrt 2)+(\sqrt 4-\sqrt 3)+(\sqrt 5-\sqrt 4)+\dots$?
147005
Prove two identities relating to series
48728
Number equations and preserving alignment of equal signs
70390
is there a closed form expression for the following matrix infinite series
41251
making a big summation sign
30851
Find the summation $\frac{1}{1!}+\frac{1+2}{2!}+\frac{1+2+3}{3!}+ \cdots$
108688
An identity involving products of sums
154596
When should \cdot be used to indicate multiplication?