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Apr
14
accepted Finding a counter example for $ \left(A+A\right)'\subseteq\left(A'+A\right)\cup\left(A'+A'\right)$
Apr
12
accepted Different definitions of limit points?
Apr
3
accepted Why can you place in the recursive definition to find the limit?
Apr
1
accepted Finding the limit of $\sqrt[n]{{kn \choose n}}$
Mar
23
accepted Finding $\sup$ of $\{\sqrt{n} - \lfloor\sqrt{n}\rfloor | n\in\mathbb{N}\}$
Mar
16
accepted Proving $2(\sqrt{n} - 1) < \sum\limits_{i=1}^n\frac{1}{\sqrt i}$
Dec
23
accepted Why does the definition of limits of a function have strict inequality?
Dec
23
accepted finding a limit of a function by definition
Dec
16
accepted Proving that $m^p-m$ is divisible by $p$
Dec
9
accepted Limit of $\left(\frac{n^{2}+8n-1}{n^{2}-4n-5}\right)^{n}$, is the following true?
Dec
8
accepted Proving that $(1+\frac{x}{n})^n\to e^x$?
Dec
5
accepted $\mathbb{R}\subset\mathbb{F}\subset\mathbb{C}$ implies $\mathbb{F}=\mathbb{R}$ or $\mathbb{F}=\mathbb{C}$?
Nov
28
accepted $a_{n+1}=\frac{1}{4}+a_n^2$ is converging and have a limit
Nov
21
accepted Proving $0$ is the limit of $\frac{n}{2^n-1}$ from definition alone
Nov
21
accepted Proving a vector space over itself have no subspaces
Nov
14
accepted Proving the sup of $\{\frac{n-m}{n+m}|n,m\in \mathbb{N}, m<n\}$
Nov
7
accepted Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
Nov
4
accepted proving a simple function is bijective
Nov
3
accepted Using the AM-GM inequality on 2 elements to deduce it's true for 4?
Nov
2
accepted In field ($F, +, \cdot$) , how can I prove $x^2 =1\implies x=1,-1$