count it
Posted: Sun Jan 06, 2013 4:15 pm
$\frac{n+y}{n}$ is an integer for some integer value of $n$ while $y$ is an integer.find the summation of the value of all $n$
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Re: count it
Posted: Sun Jan 06, 2013 10:24 pm
Write $\frac{n+y}{n}=1+\frac{y}{n}$ so $n$ must divide $y$. Thus sum of the values of all $n$ is actually the sum of divisors of $y$.
Re: count it
Posted: Mon Jan 07, 2013 11:32 am
@ SANZEED, Rafe has said $n\in Z$, not $n\in N$.
If $a$ divides $y$, then $-a$ also divides $y$. Hence summation of all values of $n$ is $0$.
In my pc, I am not seeing \mathbb characters. Is it happening also to you? If is, then I think the file 'AMSmath.js' has been damaged in this server. We should inform it to Moon Vai immediately.
If $a$ divides $y$, then $-a$ also divides $y$. Hence summation of all values of $n$ is $0$.
In my pc, I am not seeing \mathbb characters. Is it happening also to you? If is, then I think the file 'AMSmath.js' has been damaged in this server. We should inform it to Moon Vai immediately.
Re: count it
Posted: Mon Jan 07, 2013 2:04 pm
No, all \mathbb symbols are loading alright in my PC. You might try clearing your jsMath cache.Phlembac Adib Hasan wrote:In my pc, I am not seeing \mathbb characters. Is it happening also to you? If is, then I think the file 'AMSmath.js' has been damaged in this server. We should inform it to Moon Vai immediately.
Re: count it
Posted: Tue Jan 08, 2013 1:35 pm
Thanks. It helped.