Question

An Irrational number
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Answer 1

 √5, √11, √21, etc., are examples of irrational numbers

Answer 2

Answer:

An irrational number is a real number that can't be expressed as a ratio of integers

Step-by-step explanation:

For example √2 is an irrational number

Euler's number e: 2.71828182

pi π : 3.14159265358