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glowstonetrees
  • Member for 6 years, 5 months
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7 votes

Group theory: what does it mean for permutations to have an even or odd parity?

6 votes
Accepted

Express the sequence $\{x_n\}$ where $x_n = 2x_{n-1} + 3x_{n-2}$ in terms of ${x_0, x_1, n}$

6 votes

Speed of two trains travelling side by side

6 votes

Prove $\sum\limits_{n=1}^{\infty} a_{f(n)} = \dfrac{3}{2} \ln(2) $

6 votes

probability - getting a red ball in thenext draw is

6 votes

Solution of $x^{x^x}=3$

5 votes
Accepted

What is the remainder when $1995! -1$ is divided by $100 * 101$?

5 votes

Why is $f(x)=\frac {\frac{1}{x-1} + \frac{1}{x+1}}{\frac{2}{x+1} + \frac{1}{x}}$ defined at -1, 0 and not at 1

4 votes
Accepted

Improper integrals with polynomial in the denominator - how does p-series apply?

4 votes
Accepted

$\sum_{n=1}^\infty (n+1) \frac{80^n}{81^n}$ converges.

4 votes
Accepted

Integer equations

4 votes
Accepted

How to use radical rules for this?

4 votes

If $x^3 + y^3 + z^3 = 0$, $x$ and $y$ are odd positive integers while $z$ is an even negative integer then $x ≠ y$. How come?

4 votes

how to solve this recurrence relation with the initial conditions given

3 votes

Euler circuit with ten edges, two vertices of degree 2 and the rest of vertices with the same degree

3 votes
Accepted

Weird Integration Anomaly: $\ln x = \ln \pi x$

3 votes
Accepted

Probability of euclidean distance between two random points inside a unit circle/sphere greater than 1

3 votes

Student claims $\lim_{x \to 0^+} \lim_{h \to 0} \frac{f(x+h)-f(x)}{h} = \lim_{h \to 0} \lim_{x \to 0^+} \frac{f(x+h)-f(x)}{h}$. Is it justified?

3 votes

counting pasword character when repeated allowed

3 votes
Accepted

The flag colouring problem

3 votes
Accepted

How to describe the graph of a spiral whos origin moves over time?

3 votes
Accepted

Minimum degree of polyonial (several variables) such that it vanishes in a prescribed number of points?

3 votes

MLE of $\mu$ when $X_1,\ldots,X_n$ are i.i.d $N(\mu,\mu^2)$

3 votes
Accepted

Paths on a grid

3 votes
Accepted

How many different ways are there to choose 5 items from 12 distinct items if…

3 votes
Accepted

Set of equalities

2 votes

Evaluating the Laurent series of $\frac{1}{\exp (z) -1 }$

2 votes
Accepted

Help for $\int_0^{\pi^2}\int_\sqrt{x}^{\pi} \sin(y^3) \,\mathrm{d}y \,\mathrm{d}x$

2 votes
Accepted

Could someone elaborate on this algebraic transformation?

2 votes
Accepted

Linear spline over a polynomial

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