# Answer on Abstract Algebra Question for mukul roi

Question #10606

What are real numbers?

Expert's answer

real numbers are :& 1,-2, 0.25, sqrt(2),pie,e,1/4....

In fact, nearly all numbers you know from the school course are real numbers. Example of numbers which are not real: sqrt(-1), infinity. In pure mathematics there are another concepts of numbers which are not real, but this is rocket science, so to speak.

Real numbers did not have a name before imaginary numbers showed up. They got called "real" because they are not imaginary.

In fact, nearly all numbers you know from the school course are real numbers. Example of numbers which are not real: sqrt(-1), infinity. In pure mathematics there are another concepts of numbers which are not real, but this is rocket science, so to speak.

Real numbers did not have a name before imaginary numbers showed up. They got called "real" because they are not imaginary.

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