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Mathematics
Quo Si Than's user avatar
Quo Si Than's user avatar
Quo Si Than's user avatar
Quo Si Than
  • Member for 5 years, 8 months
  • Last seen more than 1 year ago
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21
Convergence of $a_n$ given $a_{\lfloor{x^n}\rfloor}$ converges to $0$ [duplicate]
Nov 27, 2018
6
Find $\frac{\partial^2 f}{\partial x \partial y}(0, 0)$ given that $\lim_{(x, y) \to (0,0)} \frac{f(x, y) - \tan{(x)}\sin{(y)}}{x^2 + y^2} = 0$.
Jun 14, 2019
3
Convergence of $\sum_{n = 1}^\infty \frac{(-1)^n}{n + n^2(1 + (-1)^n)}$
Dec 19, 2018
3
Prove $f(x_0) = x_0$ iff $f'(1) > 1$
Mar 27, 2019
3
$f(x) = \frac{4 + x}{2 + x - x^2}$, calculate $f^{(9)}(1)$
May 27, 2019
2
Find $f,g$ s.t. $f\circ g=\begin{pmatrix}1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10\\ 10 & 4 & 5 & 7 & 8 & 9 & 2 & 6 & 3 & 1\end{pmatrix}.$
Dec 9, 2018
2
Number of permutations of $\{1, 2, \dots, n\}$ with $1$ in an even cycle?
Jun 28, 2022
1
Linear independence over $\mathbb{Z}_p^r$
Nov 23, 2018
1
Prove convergence of $\sum_{n=2}^\infty \frac{\ln^5{(2n^7 + 13)} + 10\sin{n}}{n \ln^6{(n^{7/8} + \sqrt{n} - 1)} \cdot \ln( \ln (n + (-1)^n))}$
Jan 14, 2019
1
Sequence of polynomials $f_n [0, 1] \to \mathbb{R}$ of the same degree converges uniformly to a polynomial
May 7, 2019