Question

arata ca nr 2³⁴¹+3⁶²¹ este se divide cu 5 dau coroana​

Answer 1

$\it \left.\begin{aligned} \it u(2^{4k+1})=2\\ \\ \it u(3^{4q+1})=3\end{aligned}\right\}\ \Rightarrow u(2^{4k+1}+3^{4q+1})=5 \Rightarrow (2^{4k+1}+3^{4q+1})\ \vdots\ 5\\ \\ \\ 341=340+1\in M_4+1;\ \ \ 621=620+1\in M_4+1$