

Bài 1:Chứng minh rằng: [tex]3a^{4}-14a^{3}+21a^{2}-10a\vdots 24[/tex]
Bài 2: Tìm [tex]n\epsilon N[/tex] để:
a, [tex]2^{n}+2015\vdots 7[/tex]
b, [tex]n^{10}+1\vdots 10[/tex]
c, [tex]n.2^{n}+3^{n}\vdots 5[/tex]
Bài 2: Tìm [tex]n\epsilon N[/tex] để:
a, [tex]2^{n}+2015\vdots 7[/tex]
b, [tex]n^{10}+1\vdots 10[/tex]
c, [tex]n.2^{n}+3^{n}\vdots 5[/tex]