Question

Elementele multimii A={x| x€N si 2x+7<20} sunt…

Answer 1

$\it 2x+7<20\Big|_{-7} \Rightarrow 2x<13\ \stackrel{x\in\mathbb{N}}{\Longrightarrow}\ A=\{0,\ \ 1,\ \ 2,\ \ 3,\ \ 4,\ \ 5,\ \ 6\}$

Answer 2

2x+7<20

2x<13

x={0,1,2,3,4,5,6}

A={0,1,2,3,4,5,6}

Sper că e ok!