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Hint: what are the definitions of each type of number?
is it inverse?
No, I mean: what's a rational number? what's an irrational number, and so on?
Here are some quick definitions: Integer: Whole number (ie number with no decimal parts). Natural number: Any whole number that is positive and not zero (eg: 1, 2, 3, 4...) Rational Number: Number that can be written as a fraction of two integers. Irrational Number: A number that CANNOT be written as a fraction of two integers. Real Number: At the moment, it's pretty much any number you can think of. So every number is a real number (for now). You'll find on later in algebra that there are other types of numbers that are not real numbers.
so its rational?
Yes, since it's -4 (an integer) over 3 (another integer)
okay thank you. and then the book has an example of the square root of -144= -12 belongs to the set of integers, the set of rationals, and the set of reals... do i need to find a number like they did? (-12)
Ummm, the square root of (-144) doesn't exist. Did you mean minus the square root of plus 144?
minus the square root. sorry. and i looked in the back of the book and got it figured out. thanks for the help!