The predecessor of 1 is 0. If you define "natural numbers" as starting at 1, then 1 has no predecessor. (Natural numbers can be defined either to include, or to exclude, zero.)
Any positive integer not including 0. Also known as "counting numbers." 1,2,3,4,5,6,7,8,9,10,11...
it is natural is it from earth
define or describe each set of real numbers?
This is numbers divisible by 2
There is only one such set.One way to define the set is {x: x in N, x > 42}.
Natural (counting) numbers; integers; rational numbers; real numbers; complex numbers. And any other set that you choose to define, that happens to include the number 7 - for example, the set of odd numbers, the set of prime numbers, the set of the numbers {5, 7, 14, 48}, etc.
You must remember that complex numbers need two parts - a real and an imaginar part, so you have to define fields for these parts. You also need to define methods at least for the basic operations, such as addition, subtraction, multiplication and division. You may also want to define methods for more advanced operations, such as trigonometric functions and the exponential function and natural logarithm, all of which have special definitions in the case of complex numbers.
define light and vision in relation to natural light and artificial light.
Natural (counting) numbers; integers; rational numbers; real numbers; complex numbers. And any other set that you choose to define, that happens to include the number 4 - for example, the set of square numbers, or even numbers, the set of the numbers {3, 4, 5, 7, 14, 48}, etc, the set of numbers containing the letter o in their English name.
Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
Stright edge