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What are examples of irrational numbers?

Updated: 4/28/2022
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13y ago

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An example is the square root of a number. Ex: square root of 2. This is 1 example, not the main one.

Any cube root or square root which doesn't give a perfect number is an irrational number. Ex; square root and cube root of 5, since their answer will be 2.24 and 1.70 which are not perfect numbers like square roots of 25 and 64 or cube roots of 27 and 216.

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13y ago
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12y ago

Pi 3.14159... is an irrational number. That's just one example, there are infinitely many of them, just like rational numbers. The word "irrational" means it cannot be expressed as a ratio, or fraction, of any two rational numbers. By the way, the other meaning of irrational meaning non-sensical comes from the same root. The ancient Greeks thought that Irrational Numbers don't exist (they were wrong about that). So something irrational was impossible, pure nonsense.

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