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 Dec 13 comment What is $\sum_{n=1}^{\infty} \frac{n}{2^{\sqrt{n}}}$? Could L'Hôpital's rule be applied? It is infinity over infinity. ALso, according to wolfram alpha "lim x->infinity sum (x/(2^sqrt(x)))" returns $51.919191....$ Dec 11 awarded Caucus Dec 7 revised Maximum area of a isosceles triangle in a circle with a radius r edited body Dec 7 revised Maximum area of a isosceles triangle in a circle with a radius r added 320 characters in body Dec 7 revised Maximum area of a isosceles triangle in a circle with a radius r edited body Dec 7 asked Maximum area of a isosceles triangle in a circle with a radius r Dec 6 awarded Yearling Dec 6 accepted The minimum value of $\frac{a(x+a)^2}{\sqrt{x^2-a^2}}$ Dec 6 revised The minimum value of $\frac{a(x+a)^2}{\sqrt{x^2-a^2}}$ edited body; edited title Dec 6 comment The minimum value of $\frac{a(x+a)^2}{\sqrt{x^2-a^2}}$ Oops. It was for an applied optimization problem. It didn't explicitly say "maximum," but I didn't want to include the extra info, just the derivative. I will edit Dec 6 asked The minimum value of $\frac{a(x+a)^2}{\sqrt{x^2-a^2}}$ Dec 6 accepted Maximize area of a corral Dec 6 asked Maximize area of a corral Nov 1 accepted $a^4+b^2+c^2=2014$ Nov 1 asked $a^4+b^2+c^2=2014$ Oct 11 answered Graph single equation on calculator Sep 24 awarded Autobiographer Sep 17 awarded Tumbleweed Sep 15 accepted $\displaystyle \frac{d}{dx}2^x$ where $x=0$ Sep 15 comment $\displaystyle \frac{d}{dx}2^x$ where $x=0$ @Shahar Yes {need more characters}