Mathematics
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kelvin hong 方
  • Member for 4 years, 4 months
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All Questions Answers
Score Newest
question
9
Let $G$ be a group and let $S$ be a subset such that if $a\in S$ then $a^{-1}\not \in S$.
Feb 14, 2019
question
7
A Diophantine Equation related to arithmetic progression: $T_n=a^n+b^n+c^n$.
Oct 11, 2019
question
6
Finding a closed form for $I_n=\int_0^1 \prod_{l=1}^n\left[x^2-\frac{l^2}{n^2}\right]dx$
Jan 18, 2019
question
5
How many solution does $1/a+1/b+1/c+1/d=1$ have?
Apr 21, 2018
question
5
The Proof of Infinitude of Pythagorean Triples $(x,x+1,z)$
Apr 21, 2018
answer
5
If $pqr(p+q+r)$ is a square and $p,q,r$ are primes, then what's the maximum value of $p+q+r$?
Aug 26, 2018
answer
5
Evaluation of the sum $\sum\limits_{n=1}^{\infty}\frac1n\sin\frac1n$
Mar 1, 2019
answer
4
find the value $2^n\equiv ?\pmod {12}$
Jan 19, 2019
answer
4
Is it possible to integrate $\int_0^1 \frac{x^{n}}{x+5} dx + \int_0^1 \frac{x^{n-1}}{x+5} dx$? If so, how?
Apr 19, 2019
question
4
Show $\sum_{k=1}^{n-1} x^k(1-x)^{n-k}$ converges to 0 uniformly.
Oct 25, 2020

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