Aryabhata
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 Jan27 revised How to proceed with the following integration? added 88 characters in body Jan27 revised Why $\sum_{j=1}^mj^p \sim m^{p+1}$ as $n\to\infty$? added 101 characters in body Jan27 comment Calculating Euler's totient function values. @Amad27: Once you solve this yourself (based on OohAah's comment), please add an answer and tick that. Jan27 comment Calculating $\sum_{k=0}^{n-1}\frac{1}{a+bk^2}$. A closed form is unlikely, but you can try and use Euler-MacLaurin Summation formula, which is beyond algebra-precalculus. Jan27 answered Why $\sum_{j=1}^mj^p \sim m^{p+1}$ as $n\to\infty$? Jan27 revised Calculating Euler's totient function values. edited tags Jan27 answered nth derivative of a troublesome function Jan27 comment Number of real roots of $2 \cos\left(\frac{x^2+x}{6}\right)=2^x+2^{-x}$ @mathamphetamines: The question is asking for the number of real roots. What prevents it from being 42 or infinity or etc? Jan27 revised Number of real roots of $2 \cos\left(\frac{x^2+x}{6}\right)=2^x+2^{-x}$ edited tags Jan27 revised Show that $n^4+4$ is not a prime number edited tags Jan26 comment Remove minimal number of elements Search the web for sum free subsets. Jan26 revised Prove, inequality ,positive numbers edited tags Jan25 comment Seperating points in the complex plane @MarkMcClure: Yeah, I guessed that (smiley and all :)). Just wanted to make you aware of that meta thread, that's all. There are reasons to post an answer instead of a comment, even if you think it is trivial etc. Sorry if my comment sounded like an accusation. It was not. Jan25 comment Relationship between increasing integer sequences btw, using density arguments, the answer is probably yes. Jan25 comment Solve recurrence relation merge sort What do you mean by "solve" exactly? Find out whether $a(n) = \Theta(n \log n)$? Or some exact formula etc? Jan25 comment Relationship between increasing integer sequences Are you trying to prove the converse of Beatty's theorem? Jan25 comment Seperating points in the complex plane @MarkMcClure: Why post an answer as a comment? Post it as an answer. user86418 is doing the right thing: meta.math.stackexchange.com/questions/1559/… Jan25 comment Why is this sum wrong? @Redding: The example I gave you is a good example. But the simplest reason is that the theorems you use to justify taking individual limits only involve finite number of terms, independent of $n$. There are no such theorems when the number of terms is dependent on $n$. Jan25 answered Why is this sum wrong? Jan24 revised The Diophantine equation $x^2 + 2 = y^3$ edited tags