Kalendernøtt 8
Moderatorer: Vektormannen, espen180, Aleks855, Solar Plexsus, Gustav, Nebuchadnezzar, Janhaa
For alle [tex]0\leq y\leq 20[/tex] finnes det
[tex]\sum_{n=0}^{20} 2n+1 =441[/tex] tallpar [tex](x,y)[/tex]
For alle [tex]-1\leq y\leq -20[/tex] finnes det [tex]441-41[/tex] tallpar [tex](x,y)[/tex]
totalt [tex]441+440= 881[/tex]
[tex]\sum_{n=0}^{20} 2n+1 =441[/tex] tallpar [tex](x,y)[/tex]
For alle [tex]-1\leq y\leq -20[/tex] finnes det [tex]441-41[/tex] tallpar [tex](x,y)[/tex]
totalt [tex]441+440= 881[/tex]