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1h
comment How to not feel bad for doing math?
Be selfish and do what you love.
1d
comment De Moivre's Theorem (Trigo)
Well for example $\sin^2\theta=\frac12(1-\cos(2\theta))$...
2d
answered Help solve ${{z}^{3}}=\overline{z}$ ($z\in \mathbb{C}$)
May
22
comment Find the number of points of where this function isn't differentiable.
...note you can have $\lim_{x\rightarrow a^+}f'(x)=\lim_{x\rightarrow a^-}f'(x)$ and $f$ not differentiable at $a$... you need to talk about continuity before $\lim_{x\rightarrow a^+}f'(x)=\lim_{x\rightarrow a^-}f'(x)$ is relevant.
May
21
comment Prove $\frac{1}{n} =\frac{1}{n+1}+\frac{1}{n(n+1)}$ for all integers $n\in\Bbb Z$
I would say if the OP is having such problems to note that $\frac{1}{n+1}=\frac{n}{n}\frac{1}{n+1}=\frac{n}{n(n+1)}$ and this equality holds because $\frac{n}{n}=1$ for $n\neq 0$ and multiplying by one doesn't change a number. Also the multiplication of fractions is top by top, bottom by bottom which isn't hard to show with a reasonable definition of what a fraction is.
May
21
comment Number Of races needed?
Why can't you just run them all off against each other??? i.e. one race.
May
20
comment Find springs position at the time
...it is $+52$... the numbers are a little bit messy to be honest.
May
20
answered Find springs position at the time
May
20
comment Is $\Bbb R$ the soberification of $\mathbb{Q}$?
mathoverflow.net/questions/72217/…
May
20
comment Is $\Bbb R$ the soberification of $\mathbb{Q}$?
Has it anything to do with drunk people having no "filter"? Is this real life?
May
20
comment Is $\Bbb R$ the soberification of $\mathbb{Q}$?
Please tell me a space that is not sober is a drunk space????
May
18
comment Modeling curves in nature?
There is more to approximation than interpolation!
May
18
comment Modeling curves in nature?
en.wikipedia.org/wiki/Approximation_theory
May
18
revised Integration, of $x^a$ where $a$ is an irrational number.
added 77 characters in body
May
18
answered Integration, of $x^a$ where $a$ is an irrational number.
May
17
comment Show that $f(x) = 0$ for all $x \in \mathbb{R}$
@S.Panja-1729 what is the derivative got to do with it? A priori $f$ might not even be differentiable.
May
17
answered Open conjectures in number theory that is easy to do some programming for
May
17
comment Why does normal distribution have the same shape regardless of its parameters?
I am calling $N[0,1]$ by $z$.
May
17
comment Why does normal distribution have the same shape regardless of its parameters?
OK maybe what you need to look at is math.fsu.edu/~kutter/transformationsofgraphs.pdf
May
17
answered Why does normal distribution have the same shape regardless of its parameters?