Question

How can you tell what a real number is?

Answer 1

it is basically any number

Answer 2

decimals while numbers anything or all

Answer 3

So how would you be able to estimate a domain and range if it's possible to have all real numbers?

Answer 4

well u just say the set of real numbers\[\in R\]

Answer 5

Ohhh!!! drr... Thank you!

Answer 6

or you can use
\[(-\infty,\infty)\]

Answer 7

To answer that question, it is better to know what are considered NON-REAL. Complex numbers(square root of a negative number), numbers resulting from division by zero are examples of NON-REAL numbers. Anything else that is well defined in Mathematics (irrational,pi, e, fractions, integers) are considered REAL.