Question

urgent! va rog frumos ​

Answer 1

Răspuns:

Explicație pas cu pas:.................................

Answer 2

$\it a)\ x\in\mathbb{N},\ x+1|5 \Rightarrow x+1\in\{1,\ 5\}|_{-1} \Rightarrow x\in\{0,\ 4\}=A\\ \\ b)\ 10\vdots(x-2)\Rightarrow x-2\in\{1,\ 2,\ 5,\ 10\}|_{+2} \Rightarrow x\in\{3,\ 4,\ 7,\ 12\}=B\\ \\ e)\ 2x+1\in D_{15}\Rightarrow 2x+1\in\{1,\ 3,\ 5,\ 15\}|_{-1}\Rightarrow 2x\in\{0,\ 2,\ 4,\ 14\}|_{:2}\Rightarrow\\ \\ \Rightarrow x\in\{0,\ 1,\ 2,\ 7\}=E$