Question

URGENT! OFER COROANA
EX 20​

Answer 1

(-2,2)

[-3,3]

x=0

[2,5]

Answer 2

$\it a)\ \ |x| < 2 \Rightarrow -2 < x < 2 \Rightarrow x\in\{-1,\ \ 0,\ \ 1\}\\ \\ \\ b)\ \ |-x|\leq3 \Rightarrow |x|\leq3 \Rightarrow -3\leq x\leq3 \Rightarrow x\in\{-3,\ -2,\ -1,\ 0,\ 1,\ 2,\ 3\}\\ \\ \\ c)\ \ |x|\leq0 \Rightarrow x=0\ \ (modulul\ nu\ \ este\ niciodat\breve a\ negativ)\\ \\ \\ d)\ \ 2\leq |x|\leq5\\ \\ I)\ \ x < 0 \Rightarrow 2\leq\ -x\leq5\bigg|_{\cdot(-1)} \Rightarrow -5\leq x\leq -2 \Rightarrow x\in\{-5,\ -4,\ -3.\ -2\}$

$\it II)\ x\geq0 \Rightarrow 2\leq x\leq5 \Rightarrow x\in\{2,\ 3,\ 4,\ 5\}\\ \\ \\ Deci,\ x\in\{-5,\ -4,\ -3,\ -2,\ 2,\ 3,\ 4,\ 5\}$