Question

va rog {x|x€N,x-7<3}

Answer 1

Notăm cu "M" mulțimea.

$M=\left \{ x\:|\:x\:\in\:\mathbb{N} ,x-7<3\right \}$

$x - 7 < 3$

$x < 3 + 7$

$x < 10$

$x \: \in \: \mathbb{N} = > x \: \in \:\left \{ 0,1,2,3,4,5,6,7,8,9 \right \}$

$=>M=\left \{ 0,1,2,3,4,5,6,7,8,9 \right \}$