c)
[tex]\mathbb{Q}\cap A=\left\{-2,-\dfrac{1}{3},0,5,9\dfrac{2}{7}\right\}\\(\mathbb{Q}\cap A)\setminus \mathbb{Z}=\left\{-\dfrac{1}{3},9\dfrac{2}{7}\right\}[/tex]
d)
[tex]\mathbb{N}\cup \mathbb{Q}=\mathbb{Q}\\A\setminus(\mathbb{N}\cup \mathbb{Q})=A\setminus \mathbb{Q}= \left\{\sqrt2,\pi\right\}[/tex]
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c)
[tex]\mathbb{Q}\cap A=\left\{-2,-\dfrac{1}{3},0,5,9\dfrac{2}{7}\right\}\\(\mathbb{Q}\cap A)\setminus \mathbb{Z}=\left\{-\dfrac{1}{3},9\dfrac{2}{7}\right\}[/tex]
d)
[tex]\mathbb{N}\cup \mathbb{Q}=\mathbb{Q}\\A\setminus(\mathbb{N}\cup \mathbb{Q})=A\setminus \mathbb{Q}= \left\{\sqrt2,\pi\right\}[/tex]