Question

3. Numărul elementelor mulţimii 4 = {x € Z* | |x|​

Answer 1

$\it |x| < 4 \Rightarrow-4 < x < 4\ \stackrel{x\in\mathbb{Z}^*}{\Longrightarrow}\ A=\{-3,\ -2,\ -1,\ 1,\ 2,\ 3\}\ \ are\ 6\ elemente\\ \\ cardA=6$

Answer 2

Răspuns:

A= lxl < 4

x ∈ Z*

-4 < x < 4

x={-3.-2,-1,1,2,3}

cardinal A=6 elemente