Question

trebuie să ma ajutați va tog​

Answer 1

A = { x/ x= 3a+5, a€ F}

A= {5,8,11,13,0}

B= {x= a³, a€F}

B={0,1,8,125}

Answer 2

$\it a)\\ \\ a\in F \Rightarrow a\in\{0,\ 1,\ 2,\ 5\}|_{\cdot3} \Rightarrow 3a\in\{0,\ 3,\ 6,\ 15\}|_{+5} \Rightarrow\\ \\ \Rightarrow3a+5\in\{5,\ 8,\ 11,\ 20\} \Rightarrow A=\{5,\ 8,\ 11,\ 20\} \\ \\ b)\\ \\ a\in\{0,\ 1,\ 2,\ 5\} \Rightarrow a^3\in\{0^3,\ 1^3,\ 2^3,\ 5^3\} \Rightarrow B=\{0,\ 1,\ 8,\ 125\}$