Number theory
Prove that if 'a' belongs to 'Z' then the only positive divisor of both 'a' and 'a+1' is 1.
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nafistiham
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Re: Number theory
When $k$ divides $a$ and $a+1$ then, $k$ divides $a+1-a=1$
so, $k=1$
so, $k=1$
\[\sum_{k=0}^{n-1}e^{\frac{2 \pi i k}{n}}=0\]
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.