Question

26 mũ 15 -34 mũ 80 chia hết cho 10

nhớ trình bày nha

Answer 1

Ta có : \(26^{15}=\overline{...6}\)

            \(34^{80}=\left(34^2\right)^{40}=\left(\overline{...6}\right)^{40}=\overline{...6}\)

\(\Rightarrow26^{15}-34^{80}=\left(\overline{...6}\right)-\left(\overline{...6}\right)=\overline{...0}⋮10\)

hay \(26^{15}-34^{80}⋮10\)

Vậy \(26^{15}-34^{80}⋮10\).