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Top Questions
50
votes
Are there real-life relations which are symmetric and reflexive but not transitive?
elementary-set-theory
relations
asked Jan 1 at 18:17
math.stackexchange.com
14
votes
Donald Knuth's summation notation confuses me.
sequences-and-series
notation
asked May 16 '12 at 5:13
math.stackexchange.com
13
votes
Is there a closed form for the series $\sum_{k=1}^\infty \frac{\ln(4k-3)}{(4k-3)}-\frac{\ln(4k-1)}{(4k-1)}?$
sequences-and-series
asked Dec 8 '12 at 7:35
math.stackexchange.com
10
votes
What is the coefficient of the $x^3$ term in the expansion of $(x^2+x-5)^7$ (See details)?
combinatorics
algebra-precalculus
multinomial-coefficients
asked Sep 22 '12 at 0:21
math.stackexchange.com
9
votes
What is $f(x)$ divided by $(x-a)$?
algebra-precalculus
sequences-and-series
polynomials
asked Jan 14 '12 at 19:12
math.stackexchange.com
8
votes
What is the purpose of Plato's concept of Form?
ontology
plato
asked Jan 23 '12 at 23:23
philosophy.stackexchange.com
5
votes
Is there a unique solution for this quadratic matrix equation?
linear-algebra
matrices
asked Jan 3 '12 at 4:16
math.stackexchange.com
5
votes
How do I read this question?
abstract-algebra
asked Dec 29 '12 at 0:43
math.stackexchange.com
Top Answers
14
I can't do math?
math.stackexchange.com
9
Calculate the sum of series $\sum\limits_{i=0}^{n-1} i2^i$
math.stackexchange.com
8
How does mathematical coefficients differ from “physical coefficients”?
math.stackexchange.com
7
How to simplify polynomials
math.stackexchange.com
5
Complicated rational equation to solve
math.stackexchange.com
5
Power summation of $n^3$ or higher
math.stackexchange.com
5
Donald Knuth's summation notation confuses me.
math.stackexchange.com
5
Want to show $\sum_{n=2}^{\infty} \frac{1}{2^{n}*n}$ converges
math.stackexchange.com
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