salut yassin et houssa
mafhamtoch salma achbrat tgolikom
salma brat tgol
montre ke 11 dévise 3^2n+2^(6n-5) likoli n yantami ila IN*
wa 6n-5 kamla fl osse fhamto daba
rah dak chi li galt salma shih
min ajl n=1 3²+2^(6*1-5)=11 (vrais)
naftarid ana 3^2n+2^(6n-5)=11k
wanobayn ana 3^(2n+2)+2^(6n+1)=11k' (3awt n b n+1)
ladayna:
3^(2n+2)+2^(6n+1)=3^2n*9+2^(6n-5)*2^6
3^(2n+2)+2^(6n+1)=[3^2n+2^(6n-5)]*9-9*2^(6n-5)+64*2^(6n-5)
3^(2n+2)+2^(6n+1)=11k*9+55*2^(6n-5)
=11[9k+5*2^(6n-5)
=11k'
wamin nastanjij ana khasia sahiha min ajl n+1
idan 11 dévise 3^2n+2^6n-5 likoli n yantami ila IN*
bonne chance tout le monde