- Thread starter
- #1
- Apr 14, 2013
- 4,425
Hey! 
I am looking at an exercise and I got stuck...
$n\epsilon \mathbb{N},n>1$
$φ(n)=|\{1 \leq k \leq n :$ the greatest common divisor of $k$ and $n$ is $1\}|$
I am asked to find $φ(n)$,but I don't know how...
I am looking at an exercise and I got stuck...
$n\epsilon \mathbb{N},n>1$
$φ(n)=|\{1 \leq k \leq n :$ the greatest common divisor of $k$ and $n$ is $1\}|$
I am asked to find $φ(n)$,but I don't know how...