count it
$\frac{n+y}{n}$ is an integer for some integer value of $n$ while $y$ is an integer.find the summation of the value of all $n$
Last edited by sourav das on Sun Jan 06, 2013 8:30 pm, edited 1 time in total.
Reason: LaTeXed
Reason: LaTeXed
Re: count it
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 $y$.
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- Phlembac Adib Hasan
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Re: count it
@ 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.
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Re: count it
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.
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Use $L^AT_EX$, It makes our work a lot easier!
Nur Muhammad Shafiullah | Mahi
- Phlembac Adib Hasan
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