Question

aflati valorile lui x stiind ca 10 se divide cu(x+1)

Answer 1

$\it 10\ \vdots\ x+1 \Rightarrow x+1\in D_{10} \Rightarrow x+1\in\{\pm1,\ \ \pm2,\ \ \pm5,\ \ \pm10\} \Rightarrow \\ \\ \Rightarrow x+1\in\{-10,\ -5,\ -1,\ 1,\ 2,\ 5,\ 10\}|_{-1} \Rightarrow x\in\{-11,\ -6,\ -2,\ 0,\ 1,\ 4,\ 9\}$