Question

fie multimea B={x apartine Z bara modul de x =-minus x } determinati toate elementele multimii B u intors {-2, -1 , 0 , 2 } va rogggg!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$\boxed{| \ x \ |>0}\\ \\ Cum \ | \ x \ |=-x \Rightarrow x<0\\ \\ \Rightarrow B=\mathbb{Z^*}_-=\{-1, \ -2, \ -3, \ -4, \ ...\} \\ \\ B \ n \ \{-2, \ -1, \ 0, \ 1, \ 2 \}=\{-2, \ -1 \}$