下列關於方根的運算何者正確？ $$\sqrt[]{1}$$ ＋ $$\sqrt[]{2}$$ ＋ $$\sqrt[]{3}$$ ＝ $$\sqrt[]{6}$$ , $$\sqrt[]{16+5}$$ ＝4＋ $$\sqrt[]{5}$$ , $$\sqrt[]{\left(-5\right)\times\left(-5\right)}$$ ＝5, 4÷ $$\sqrt[]{2}$$ ＝ $$\sqrt[]{2}$$

$$\sqrt[]{\left(-5\right)\times\left(-5\right)}$$ ＝5

國中數學二上2-2 Flashcards

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