User Ian Miller

38 votes

Accepted

Compute the $n$-th power of triangular $3\times3$ matrix

answered Jan 2, 2017 at 1:19

30 votes

101102103104105106..............149150? What is the remainder when divided by 9?

answered Nov 17, 2015 at 10:05

20 votes

Accepted

Sxx in linear regression

answered Oct 27, 2015 at 7:51

15 votes

Accepted

Roots of ln of a square

answered Dec 4, 2015 at 13:18

13 votes

Accepted

Is there a geometry in which $\pi$ is a natural number?

answered Mar 16, 2016 at 15:10

10 votes

Accepted

Parametric Equation for Rectangular Tubing with Corner Radius

answered Oct 8, 2016 at 8:05

9 votes

Accepted

Deriving Taylor series without applying Taylor's theorem.

answered Nov 9, 2016 at 0:25

8 votes

Accepted

The sum of 50 terms of the series $\frac{3}{1} $+ $\frac{5}{1+2^2} $+ $\frac{7}{1+2^2+3^2}$+ $\frac{11}{1+2^2+3^2+4^2}$...

answered Nov 9, 2016 at 16:58

8 votes

Different ways to factor

answered Sep 22, 2016 at 23:28

8 votes

Accepted

Is knowing the Sum and Product of k different natural numbers enough to find them?

answered Mar 25, 2016 at 4:12

6 votes

Domain and Range Confusion

answered Mar 20, 2016 at 4:49

6 votes

Something similar to the bizarre Koide formula?

answered Feb 19, 2016 at 6:22

6 votes

Accepted

Solving for x in a trig equation

answered Dec 8, 2015 at 8:17

6 votes

Accepted

Area bounded by Point $P$ in xy plane, If $\max\left\{\bf{PA+PB\;,PB+PC}\right\}\leq 2,$

answered Jan 13, 2016 at 4:23

6 votes

Accepted

Integration of a $\int \frac{v^2+1}{v^3-v^2+v+1}\,dv$

answered Apr 9, 2016 at 2:48

6 votes

Accepted

$\left| x \right| \le 3\left[ {\sqrt x } \right]$

answered Jun 18, 2016 at 9:14

6 votes

Accepted

Evaluating $\int\frac{x^4}{x-1} \, dx$

answered Nov 11, 2015 at 16:35

6 votes

Accepted

Limit $ \lim\limits_{n \rightarrow \infty} \left(\lim\limits_{k \rightarrow \infty} \left(\frac{1}{1+2^{n-k}}\right) \right) $

answered Oct 13, 2015 at 14:51

6 votes

Prove that $(1 + u)^{3/2} \le 1 + \frac32 u + \frac38 u^2$ for $u \ge 0$

answered Aug 11, 2016 at 16:47

6 votes

Accepted

Pandigital approximations to $e$

answered Nov 25, 2016 at 13:03

6 votes

Solutions for $a^2+b^2+c^2=d^2$

answered Jan 8, 2017 at 16:34

5 votes

Proving $\left(\frac{a}{a+b+c}\right)^2+\left(\frac{b}{b+c+d}\right)^2+\left(\frac{c}{c+d+a}\right)^2+\left(\frac{d}{d+a+b}\right)^2\ge\frac{4}{9}$

answered Jan 13, 2017 at 6:30

5 votes

Is $7^4-1=2^5 \times 3 \times 5^2$ the only counterexample?

answered Jan 19, 2017 at 15:51

5 votes

Find a minimum of $x^2+y^2$ under the condition $x^3+3xy+y^3=1$

answered Jan 21, 2017 at 7:53

5 votes

Accepted

What is the difference between metres cube and cubic metres?

answered Feb 17, 2017 at 15:16

5 votes

Measuring $\pi$ with alternate distance metrics (p-norm).

answered Dec 11, 2016 at 0:15

5 votes

How to solve $\sqrt{6}\cdot x^4 - (\sqrt{3}+\frac{3}{2}\sqrt{2})x^2 +\frac{3}{2} = 0 $

answered Nov 27, 2016 at 4:47

5 votes

How to find Jacobian?

answered Oct 23, 2016 at 2:48

5 votes

Why is time complexity of `fun` $O(n)$?

answered Oct 12, 2015 at 15:55

5 votes

Parametric equation - of a hyperbola

answered Oct 24, 2015 at 14:52

Stack Exchange Network

457 Answers

Compute the $n$-th power of triangular $3\times3$ matrix

101102103104105106..............149150? What is the remainder when divided by 9?

Sxx in linear regression

Roots of ln of a square

Is there a geometry in which $\pi$ is a natural number?

Parametric Equation for Rectangular Tubing with Corner Radius

Deriving Taylor series without applying Taylor's theorem.

The sum of 50 terms of the series $\frac{3}{1} $+ $\frac{5}{1+2^2} $+ $\frac{7}{1+2^2+3^2}$+ $\frac{11}{1+2^2+3^2+4^2}$...

Different ways to factor

Is knowing the Sum and Product of k different natural numbers enough to find them?

Domain and Range Confusion

Something similar to the bizarre Koide formula?

Solving for x in a trig equation

Area bounded by Point $P$ in xy plane, If $\max\left\{\bf{PA+PB\;,PB+PC}\right\}\leq 2,$

Integration of a $\int \frac{v^2+1}{v^3-v^2+v+1}\,dv$

$\left| x \right| \le 3\left[ {\sqrt x } \right]$

Evaluating $\int\frac{x^4}{x-1} \, dx$

Limit $ \lim\limits_{n \rightarrow \infty} \left(\lim\limits_{k \rightarrow \infty} \left(\frac{1}{1+2^{n-k}}\right) \right) $

Prove that $(1 + u)^{3/2} \le 1 + \frac32 u + \frac38 u^2$ for $u \ge 0$

Pandigital approximations to $e$

Solutions for $a^2+b^2+c^2=d^2$

Proving $\left(\frac{a}{a+b+c}\right)^2+\left(\frac{b}{b+c+d}\right)^2+\left(\frac{c}{c+d+a}\right)^2+\left(\frac{d}{d+a+b}\right)^2\ge\frac{4}{9}$

Is $7^4-1=2^5 \times 3 \times 5^2$ the only counterexample?

Find a minimum of $x^2+y^2$ under the condition $x^3+3xy+y^3=1$

What is the difference between metres cube and cubic metres?

Measuring $\pi$ with alternate distance metrics (p-norm).

How to solve $\sqrt{6}\cdot x^4 - (\sqrt{3}+\frac{3}{2}\sqrt{2})x^2 +\frac{3}{2} = 0 $

How to find Jacobian?

Why is time complexity of `fun` $O(n)$?

Parametric equation - of a hyperbola