# VIVID

The Lost City of Atlantis, Somewhere in the World

I love nature because it creates a need to learn maths.

Top Questions

## How large is the area that the bug can access?

asked Aug 28, 2020 at 10:54

## Calculate the determinant of $n^\text{th}$ order

asked Jul 13, 2020 at 14:04

## If $\tan x + \tan y = 4$ and $\cos x + \cos y = 1/5$, find $\tan(x+y)$.

asked Sep 5, 2020 at 15:33

## Show that all terms of this sequence are integers.

asked Jul 7, 2020 at 18:58

## Can one deduce that $P(x)$ is a polynomial of degree $0$ or $1$ from the following condition

asked Jun 25, 2020 at 16:49

## Computing $\sum_{k=1}^{\infty}\frac{1}{k}\int_{\pi k}^{\infty}\frac{\sin(x)}{x}dx$

asked Mar 7, 2020 at 15:55

## C++ Find all bases such that P in those bases ends with the decimal representation of Q

asked Apr 27, 2020 at 7:23

## Let $\lambda$ be a real eigenvalue of matrix $AB$. Prove that $|\lambda| > 1$.

asked Jul 22, 2020 at 18:27

## How to show that $AB=BA$ if $(A-3I)(B-3I)=2B+9I$

asked Apr 11, 2020 at 8:01