Sam Streeter's user avatar
Sam Streeter's user avatar
Sam Streeter's user avatar
Sam Streeter
  • Member for 6 years, 4 months
  • Last seen this week
10 votes
Accepted

The volume of a child's model plane is $1200~\rm{cm}^3$ & that of a full size plane is $4050~\rm{m}^3.$ Find the scale of the model in the form $1:n.$

9 votes
Accepted

What is $26^{32}\bmod 12$?

8 votes

Chances of rolling "Snake Eyes" at least once in a series of rolls.

6 votes
Accepted

Dynamic system $f(x) = 2x$ mod $1$

4 votes

Prove convergence of sequence given by $a_{1}=1$ and $a_{n+1}= \frac{1}{a_1+a_2+\ldots+a_n}$

4 votes
Accepted

Is the question even correct?

4 votes

Combinatorics permutation problem

4 votes
Accepted

Confusion in a Proof

4 votes

Mapping values in the range [-1, 1] to [0, 1] in an invertible fashion

3 votes

Counting permutation cycle types in $S_n$

3 votes

Set of real values of $k$ such that $4\cdot 2^{2x}-4k\cdot 2^x+5-4k\geq 0$ has a real solution

3 votes

Is $\lim_{n \to \infty} \left(1+\dfrac {x}{n} \right)^{n-1} = e^x$

3 votes
Accepted

What is a plain English explanation of "$\epsilon$-$\delta$ criterion" and how to use it for proving continuity?

2 votes

Advanced calculus proofs

2 votes
Accepted

Understanding and using Bertini's theorem

2 votes

are there any elementary formula of $r'_3(n)$?

2 votes

conclude that $x^{|G|} = 1_G$ by taking $H = \langle x\rangle \subset G$?

2 votes
Accepted

What is the least prime factor of $n^i \cdot m^j$, for prime numbers $n, m$ such that $n < m$?

2 votes
Accepted

$\Pi_{i=1}^{p-1}(i-1)kp + i \equiv -1 \pmod p, k \in \mathbb{Z}$ where $p$ is a prime

2 votes

Let $f(z) = \frac{1+e^z}{1-e^z} $. Determine the image of $f(A)$

2 votes

Prove true or false: $\vec{u}\cdot \vec{v} = \vec{u} \cdot \vec{w} \implies \vec{v} = \vec{w}$

1 vote
Accepted

why average value of a function is not calculated by using the formula $\frac{f(a)+f(b)}{2}$?

1 vote

Unique subfield of order $2$ of $\mathbb{Q(\zeta_{7}})$ over $\mathbb{Q}$

1 vote

Simplify a series.

1 vote

Simplifying $ x \leftrightarrow y$

1 vote

Explicit formulas for $\operatorname{Re}(z^n)$ and $\operatorname{Im}(z^n)$

1 vote
Accepted

Set of real values of $k$ such that $4\cdot 2^{2x}-4k\cdot 2^x+5-4k\geq 0$ has a real solution

1 vote

What is this graph/matrix operation called in English ? ($ M_{2} = \frac{N^{2}}{|N^{2}b|} $)

1 vote
Accepted

solve for $x$: $(x^4-13x^2+36)^4+|x^2+x-6|+\sqrt{x^3-7x+6}=0$

1 vote

Find $\tan(x+y)$ given $\sin x=3\sin(x+2y)$