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1h
comment Maxima and minima of $f(x)=\binom{16-x}{2x-1}+\binom{20-3x}{4x-5}$.
How does your calculator handle binomial coefficients?
4h
answered Approximating Fresnel integrals with standard functions
4h
comment Sum of sum of binomial coefficients
I made the same error. Great minds, eh?
4h
revised Sum of sum of binomial coefficients
fix minor error
4h
comment Sum of sum of binomial coefficients
You are right. I'll fix it. Thanks. Upvoted.
4h
comment Sum of sum of binomial coefficients
Nice when two independent answers agree.
5h
answered Sum of sum of binomial coefficients
13h
comment Is there a solution to this differential equation?
You are all right. I answered too quickly.
14h
answered Is there a solution to this differential equation?
22h
answered Where does the following series converge?
22h
comment A Chinese Exam Question which is…quite hard
What is $Q_n$? Is it a function or a point?
22h
answered Which values $a,L$ satisfy $\frac{\int_0^{4π}e^{t}(\sin^{6}(at)+\cos^{4}(at))\,dt}{\int_0^{π}e^{t}(\sin^{6}(at)+\cos^{4}(at))\,dt}=L$?
23h
answered Partition of natural number not equal to factorial
23h
comment Maximum concyclic points
See my answer for a way to do it exactly with rational arithmetic.
1d
answered Maximum concyclic points
1d
answered A fierce differential-delay equation: df/dx = f(f(x))
1d
answered Finding a basis for the set of polynomials where f(1)=f(-1)=0
1d
answered Fundamental Period of $\tan x \cot x$
1d
comment Bessel Function Integral with sin argument
Then you might be able to use the asymptotic forms: en.wikipedia.org/wiki/Bessel_function#Asymptotic_forms
1d
comment How to prove that $\lim\limits_{n\to\infty}\sqrt[n]{p}=1$?
You only need the first term, and this follows from Bernoulli's inequality: $p > 1+nh$. Then $h < (p-1)/n \to 0$.