Koja od navedenih tvrdnji nije istinita? $$-1.5\in\R$$ , $$\sqrt{2}\in\mathbb{Q}$$ , $$\sqrt{\ \frac{32}{2}}\in\ \mathbb{N}\ $$ , $$\frac{4}{2}\in\Z$$

$$\sqrt{2}\in\mathbb{Q}$$ is not true.

Što nije točno? Options: $$\mathbb{Q}\cap\text{I}=\mathbb{R}$$ , $$\mathbb{Q}\cup\text{I}=\mathbb{R}$$ , $$\text{}\text{I}\cap\mathbb{R}=\text{I}$$ , $$\mathbb{Q}\cap\mathbb{R}=\mathbb{Q}$$

$$\mathbb{Q}\cap\text{I}=\mathbb{R}$$ is not true.

Koji skup sadrži samo složene brojeve? $$\left\{1,\ 9,\ 16,\ 20,\ 25,\ 30\right\}$$ , $$\left\{2,\ 3,\ 5,\ 7,\ 11,\ 23\right\}$$ , $$\left\{2,\ 4,\ 6,\ 8,\ 10\right\}$$ , $$\left\{10,\ 18,\ 25,\ 28,\ 33\right\}$$

$$\left\{10,\ 18,\ 25,\ 28,\ 33\right\}$$

Koja od tvrdnji nije točna za skupove: $$A=\{x\epsilon Z:-3

$$A\cup B=\{-2,1,0,4,7\}$$ nije točna.

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3

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Je li tvrdnja točna ili netočna? Svaki cijeli broj ujedno je i prirodan broj.

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Netočno

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Zaokruži broj 4.57261 na jednu, dvije, tri i četiri decimale. Koji je netočno zaokružen broj?

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4.572

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