Mathematics
Profile Activity
Meta user
Network profile
5,259
reputation
5
23
53

bigfocalchord

For the things of this world cannot be made known without a knowledge of mathematics.

58
answers
219
questions
~158k
people reached
  • Antarctica
  • Member for 5 years, 1 month
  • 848 profile views
  • Last seen Dec 4 '20 at 10:32

Communities (20)

Top network posts

Top tags (90)

Score 20
Posts 37
Posts % 13
Score 20
Posts 30
Score 17
Posts 38
Score 14
Posts 33
Score 9
Posts 15
Score 6
Posts 19
View all tags →

Top posts (277)

All Questions Answers
Votes Newest
15 If two integer triples have the same sum of 6th powers, then their sums of squares agree $\bmod 9$ Dec 24 '15
12 Finding Maximum Area of a Rectangle in an Ellipse [duplicate] Mar 6 '16
9 Prove that the root is a whole number Jan 15 '17
8 Separable Differential Equation (Check Answer) Dec 28 '15
8 Proving $ z^n + \frac{1}{z^n} = 2\cos(n\theta) $ for $z = \cos (\theta) + i\sin(\theta)$ Jan 2 '16
7 A student forgot the Product Rule for differentiation and made the mistake of thinking that $(fg)'=f'g'$… Dec 16 '16
7 Finding $ \int^1_0 \frac{\ln(1+x)}{x}dx$ Dec 6 '16
7 If $a_n = \frac{1}{2} (a_{n-1}+a_{n-2})$ prove $a_n=2+4 \left(\frac{-1}{2}\right)^n$ for $n \geq 2$ Jan 5 '17
7 Find all prime numbers $p$ such that $16p+1$ is a perfect cube Dec 3 '17
7 Given $x_1 := \sqrt{2}$ and $x_{n+1} :=\sqrt{2x_n} $, prove $\sqrt{2} ≤ x_n ≤ 2$ Dec 28 '17
View all questions and answers →

Badges (81)

Gold

5

Rarest

Silver

23

Rarest

Bronze

53

Rarest

View all badges →