user avatar
user avatar
user avatar
Amanuel Getachew
  • Member for 3 years, 3 months
  • Last seen this week
4 votes
3 answers
215 views

Find all polynomials $P(x)$ with odd degree such that $P(x^2 - 2) = P^2(x)-2$

3 votes
1 answer
145 views

Missing flaw in finding all integers satisfying $\varphi(n)=n/2$, where $\varphi$ is the Euler totient function

3 votes
1 answer
140 views

$f(xf(x)) = 2f(x)$

2 votes
2 answers
61 views

$ \lim_{(x,y) \rightarrow (0,0)} (x^2+y^2)( \sin( \frac{1}{x^2+y^2} ))$

1 vote
1 answer
498 views

The prolate cycloid

1 vote
2 answers
112 views

Unknown number x, 45•G.C.F(125, x) = L.C.M (125, x)

1 vote
0 answers
64 views

Is $f$ multiplicative?

1 vote
1 answer
206 views

Why is analytic continuation practical?

1 vote
1 answer
60 views

How to eliminate parameter of parametric equations?

0 votes
1 answer
27 views

Dealing with probability

0 votes
1 answer
22 views

Show that a sequence is mutually orthogonal.

0 votes
1 answer
68 views

Show $S$ is countable

0 votes
1 answer
65 views

Area of the common region of three circles.

0 votes
1 answer
61 views

Do distinct infinities exist?

0 votes
1 answer
30 views

Guessing Efficiency

0 votes
3 answers
366 views

My Solution for IMO 1988 Problem 3

0 votes
0 answers
32 views

Find all polynomials with integer coefficients f such that for all $n > 2005$ the number $f(n)$ is a divisor of $n^{n−1} −1$.