Aryabhata
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 Sep28 revised Proving $\sum\limits_{k=0}^{n-1} \Bigl[x + \frac{k}{n}\Bigr] = [nx]$ added 45 characters in body Sep28 answered Proving $\sum\limits_{k=0}^{n-1} \Bigl[x + \frac{k}{n}\Bigr] = [nx]$ Sep28 comment Factoring a Cubic Polynomial @Hans: Right, I will edit that into the answer. Thanks. Sep28 revised Factoring a Cubic Polynomial added 173 characters in body; added 81 characters in body Sep28 answered Factoring a Cubic Polynomial Sep28 comment Geometric Progression @Debanjan: I suppose you have been asked if it is homework for earlier questions (hence your usage of word 'again'). Why don't you just mention that that is the case (from a test) and avoid getting questions like these ('is it homework')? In any case, why don't you also show some working? Test questions are like homework, in a way. Sep28 comment Party planning problem This is clearly programming related. btw, this will be off-topic on cstheory.stackexchange.com as that site is for research level CS Theory questions. Stackoverflow is more suitable, IMO. btw, is this homework? What have you done so far? Sep28 comment Recurrence relation for $a_{n}$ where $6a_{n}$ and $10a_{n}$ are both triangular +1 for the complete solution. Sep28 comment Geometric Progression Is this homework? Sep28 comment a question about group (decomposition of conjugacy classes in normal subgroups) Homework question about group? Sep28 revised Finding the limit of $\lbrace\sum_{n=1}^{k}\frac{1}{\sqrt{k^2 + n}}\rbrace_{k=1}^\infty$ added 173 characters in body Sep28 comment Finding the limit of $\lbrace\sum_{n=1}^{k}\frac{1}{\sqrt{k^2 + n}}\rbrace_{k=1}^\infty$ @Jarrod: Perhaps if you edit your question to show what you have so far, we can help further. Sep28 comment Finding the limit of $\lbrace\sum_{n=1}^{k}\frac{1}{\sqrt{k^2 + n}}\rbrace_{k=1}^\infty$ Right. Now in those two terms, can you rewrite it in the form $\frac{1}{\sqrt{something}}$? Sep28 answered Finding the limit of $\lbrace\sum_{n=1}^{k}\frac{1}{\sqrt{k^2 + n}}\rbrace_{k=1}^\infty$ Sep28 comment Finding the limit of $\lbrace\sum_{n=1}^{k}\frac{1}{\sqrt{k^2 + n}}\rbrace_{k=1}^\infty$ Is this homework? Sep27 comment Recurrence relation for $a_{n}$ where $6a_{n}$ and $10a_{n}$ are both triangular @Charles: You are welcome. Thank you for the nice problem. Sep27 answered Taking Seats on a Plane Sep27 comment Recurrence relation for $a_{n}$ where $6a_{n}$ and $10a_{n}$ are both triangular @Americo: It is _60_a = 5n^2 + 5n blah. Sep27 comment Recurrence relation for $a_{n}$ where $6a_{n}$ and $10a_{n}$ are both triangular @Hans: The numbers in the sequence are of the from $(n^2 + n)/12$, where $x = 2n+1$. So it could be anything. Sep27 answered Recurrence relation for $a_{n}$ where $6a_{n}$ and $10a_{n}$ are both triangular