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Top Questions
10
votes
Calculating a limit with trigonometric and quadratic function
limits-without-lhopital
eulers-constant
asked Feb 15, 2018 at 9:04
math.stackexchange.com
7
votes
Binomial summation $\sum\binom nkk^2$
combinatorics
summation
binomial-coefficients
generating-functions
asked Apr 13, 2018 at 12:44
math.stackexchange.com
5
votes
Multiplying congruences.
elementary-number-theory
modular-arithmetic
divisibility
asked May 27, 2018 at 16:01
math.stackexchange.com
5
votes
Find positive $K$ such that $\int_0^\infty\left(\frac{1}{\sqrt{2x^2+1}}-\frac{K}{x+1}\right)dx$ converges
real-analysis
improper-integrals
asked Feb 10, 2019 at 8:58
math.stackexchange.com
5
votes
Minimum number of lattice points required so that there exists three points whose mean is also a lattice point
combinatorics
pigeonhole-principle
asked Feb 11, 2020 at 7:37
math.stackexchange.com
5
votes
Integral part of sum of huge powers
algebra-precalculus
asked Apr 2, 2018 at 8:25
math.stackexchange.com
Top Answers
33
Are all quadratics factorable into a product of two binomials?
math.stackexchange.com
5
Covariance Identity: $\operatorname{Cov}(X,Y) = E(\operatorname{Cov}(X,Y\mid Z)) + \operatorname{Cov}(E(X\mid Z),E(Y\mid Z))$
math.stackexchange.com
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