marty cohen
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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 $h < (p-1)/n \to 0$.