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Feb
2
revised Limit $\lim\limits_{n\to \infty} \sqrt [n]{\frac{(3n)!}{n!(2n+1)!}} $
deleted 22 characters in body; edited title
Feb
2
comment Why is $\int_0^1 \frac{dx}{\sqrt{1 - x^4}} = \frac{\sqrt{\pi}\,\Gamma(5/4)}{\Gamma(3/4)}$?
math.stackexchange.com/questions/1122911/…
Feb
2
revised Singularities of $ {1}/{\cos(\frac{1}{z})}$
edited title
Feb
2
comment Find the parametric equation of a circular helix in space with central axis the $z$-axis and radius $5$.
Leave b as b, you don't need a specific value for it.
Feb
2
comment Singularities of $ {1}/{\cos(\frac{1}{z})}$
@did : it collapses on IE windows RT to a single line, what are you using that does not collapse?
Feb
2
revised Singularities of $ {1}/{\cos(\frac{1}{z})}$
edited title
Feb
2
comment Find the parametric equation of a circular helix in space with central axis the $z$-axis and radius $5$.
I was mistaken that b can b found, b is a parameter on its own and can have any value.
Feb
2
comment Find the parametric equation of a circular helix in space with central axis the $z$-axis and radius $5$.
No need to find the value of b, paramedic equation can have the b term in it.
Feb
2
revised Singularities of $ {1}/{\cos(\frac{1}{z})}$
edited title
Feb
1
revised Integral $\int_0^{\infty}\cos(a_0+a_1x+a_2x^2)\frac{1}{x^2+\frac{1}{4}}dx$
edited title
Jan
30
comment What kinds of things are infinite series useful for?
One should look at how useful are these series for practical computation.
Jan
30
comment What kinds of things are infinite series useful for?
I think by series being useful you mean power series, as they are the simplest things to work with. There are many types of series that are interesting but not useful for practical use, e.g. then common Arctan series that gives the value for $\pi$.
Jan
30
comment Proof $(\log(n))^{\log(\log(n))} = O(n)$
does $\log(n)^{\log(\log(n))} $ mean $\log(n^{\log(\log(n))}) $ or $(\log n)^{\log(\log(n))} $?
Jan
30
comment Proof $(\log(n))^{\log(\log(n))} = O(n)$
This notation is a bit ambiguous. What does $\log^{\log(\log(n))}$ mean?
Jan
30
revised Prove $2\cos^2(x)=1+\cos(2x)$
edited title
Jan
30
comment Divergent products.
@GEdgar : lets be nice :)
Jan
29
revised Integral $ \int \frac{1}{x^{1+a} (1-x)^{1-a}} dx~,~a \gt 0$
edited title
Jan
28
comment Solve $\int_0^\infty \frac{\ln x}{x^2+4} \,\mathrm{d}x$
Integrals are evaluated not solved. "Solve" for what?
Jan
28
revised Solve $\int_0^\infty \frac{\ln x}{x^2+4} \,\mathrm{d}x$
edited title
Jan
28
revised convergence of $\sum_{n=1}^\infty\frac{1}{n} [1+\frac{1}{\sqrt{2}}+…+\frac{1}{\sqrt{n}}]$
edited title