Mathematics
Alexey Burdin's user avatar
Alexey Burdin's user avatar
Alexey Burdin's user avatar
Alexey Burdin
  • Member for 8 years, 5 months
  • Last seen more than a month ago
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Score Newest
question
12
$\pi$ base $e$ or $\pi=\sum\limits_{n=-1}^{\infty} a_ne^{-n}$ where $a_n\in\{0,1,-1\}$
Apr 25, 2015
question
12
Crux problem #33 with vector approach
Jun 24, 2020
answer
7
Let $a$ and $b$ be positive integers such that $(\sqrt[3]{a} + \sqrt[3]{b} - 1)^2 = 49 + 20 \sqrt[3]{6}.$ Find $a + b.$
Sep 4, 2020
answer
7
Computing $\lim_{x\rightarrow 0}{\frac{xe^x- e^x + 1}{x(e^x-1)}}$ without L'Hôpital's rule or Taylor series
Jun 21, 2020
answer
7
Smallest subset of integers that you can use to produce 1,2,....,40
Jun 30, 2020
question
6
How many $9\times 9$ squares can I cut from this figure (it's $38\times 40$ without some corners)
Dec 15, 2015
answer
6
How to insert a polynomial between two continuous functions
Jul 28, 2020
question
6
Prove $EK'\parallel BX\Leftrightarrow EK'=2EK$ in a given triangle $EBC$ with $\angle E=90^\circ\;\ldots$
Jul 7, 2020
answer
6
Finding out if a sequence of digits is a "numpad path"
Aug 22, 2020
answer
5
Let $a_1, a_2, a_3, b_1, b_2, b_3 \in \mathbb{R}.$ Then $(a_1b_1+a_2b_2+a_3b_3)^2 \leq ({a_1^2}+{a_2^2}+{a_3^2})({b_1^2}+{b_2^2}+{b_3^2})$.
Sep 17, 2020
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How can I find questions favorited by at least $n$ users?
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16
Decorate Pascal's Triangle
11
"Деревья свалил ветер" vs "Деревья свалило ветром"
11
Reconstructing points based on the sum of their coordinates version 2
10
Circular robot instructions
8
Find me a Tinder date!

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