A)
[tex]A=\{-2,-1,0,1,2\}\\B=\{-3,-1,1,3\}[/tex]
[tex]A\cup B=\{-3,-2,-1,0,1,2,3\}\\A\cap B=\{-1,1\}\\A\setminus B=\{-2,0,2\}\\B\setminus A=\{-3,3\}[/tex]
B)
[tex]A=\left\{\dfrac{1}{2},1,2,4\right\}\\B=\{0,1,\sqrt{2},\sqrt{4}\}=\{0,1,\sqrt{2},2\}[/tex]
[tex]A\cup B=\left\{0,\dfrac{1}{2},1,\sqrt{2},2,4\right\}\\A\cap B=\{1,2\}\\A\setminus B=\left\{\dfrac{1}{2},4\right\}\\B\setminus A=\{0,\sqrt{2}\}[/tex]
C)
[tex]A=\mathbb{N}\\B=\mathbb{Z}[/tex]
[tex]A\cup B=\mathbb{Z}\\A\cap B=\mathbb{N}\\A\setminus B=\emptyset\\B\setminus A=\mathbb{Z}_-[/tex]
[tex]\mathbb{Z}_-[/tex] - liczby całkowite ujemne
