Mathematics

Mathematics

Problem

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Number	$\mathbb{N}$	$\mathbb{Z}$	$\mathbb{Q}$	$\mathbb{R}$
6	✓	✓	✓	✓
$-\frac{3}{8}$
1.8
$1.\bar{8}$
-17
$\sqrt{64}$
$\frac{\pi}{2}$
$\sqrt{-3}$
$-\sqrt{3}$

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