Question

determinati restul impartirii la 10 a nr 7 la putere n+7la putere n+1+7la putere n+2

Answer 1

[tex]7^n+7^{n+1}+7^{n+2}=\\ 7^n+7^n*7+7^n*7^2=\\ 7^n(1+7+7^2)=\\ 7^n*57=7^n(50+7)\\ 7^n(50+7):10=a,r=7[/tex]