Stack Exchange

DonAntonio

top accounts reputation activity favorites subscriptions
Top Questions
Top Answers
29
How I can prove that converges to 2?
math.stackexchange.com

27
Find $\lim\limits_{n \rightarrow \infty}\dfrac{\sin 1+2\sin \frac{1}{2}+\cdots+n\sin \frac{1}{n}}{n}$
math.stackexchange.com

17
How to simplify an expression like this: $(x^2+x^{-2}-2)^{1/2}$
math.stackexchange.com

16
Is a vector space over a finite field always finite?
math.stackexchange.com

15
how to find the sum of $1 - \ln(2) + \frac{(\ln(2))^2}{2!} - \frac{(\ln(2))^3}{3!} + \ldots $
math.stackexchange.com

14
Are there real-life relations which are symmetric and reflexive but not transitive?
math.stackexchange.com

13
Show $15x^{2} - 7y^{2} = 9$ has no integer solutions
math.stackexchange.com

12
Fraction of two binomial coefficients
math.stackexchange.com

12
How can I get sequence $4,4,2,4,4,2,4,4,2\ldots$ into equation?
math.stackexchange.com

12
Explanation of why a certain group is not a subgroup?
math.stackexchange.com

12
Solve without using L'Hôpital's rule?
math.stackexchange.com

12
Does the series $\sum n!/n^n$ converge or diverge?
math.stackexchange.com

11
Limit of the sequence $\lim_{n\rightarrow\infty}\sqrt[n]n$
math.stackexchange.com

11
Show that $\frac{(3^{77}-1)}{2}$ is odd and composite
math.stackexchange.com

11
Proving $n^4 + 4 n^2 + 11$ is $16k$
math.stackexchange.com

11
Calculate $\displaystyle\lim_{x\to a}\frac{a^{a^{x}}-{a^{x^{a}}}}{a^x-x^a}$
math.stackexchange.com

11
What sequence has this property?
math.stackexchange.com

11
Prove $\int_0^\infty \frac{\ln(\tan^2 (ax))}{1+x^2}dx = \pi\ln(\tanh(a))$
math.stackexchange.com

10
Prove $H$ is normal subgroup
math.stackexchange.com

10
Why is $\Gamma(1/2)=\sqrt{\pi}$?
math.stackexchange.com

10
Evaluate $\lim_{n\to\infty}\sum_{k=1}^{n}\frac{k}{n^2+k^2}$
math.stackexchange.com

10
Calculate $\lim_{x\to 0}\frac{\ln(\cos(2x))}{x\sin x}$
math.stackexchange.com

10
Show y is odd in the equation $y^3 =x^2 +2$
math.stackexchange.com

9
Why $A_{5}$ has no subgroup of order 20?
math.stackexchange.com

9
Elements of $\mathbb{F}_p$ having cube roots in $\mathbb{F}_p$
math.stackexchange.com

9
Sigma question: is it legal to write something like this?
math.stackexchange.com

9
Proof: If n is a perfect square, $\,n+2\,$ is NOT a perfect square
math.stackexchange.com

9
Subgroups of order $p$ and $p^{n-1}$ in a group of order $p^n$.
math.stackexchange.com

9
Truth set of $-|x| \lt 2$?
math.stackexchange.com

9
Evaluate $\sum_{n=1}^{\infty}\frac{1}{n^3+3 n^2+2 n}$
math.stackexchange.com

1 2 3 4 5 6