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(Free-Press-Release.com) September 11, 2011 --
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Number System
Numbers along with arithmetic operators.
Number
Concept of counting or measuring. example 4 cows, 6 trees.
(a) Natural Numbers (N)
Numbers of the type 1, 2, 3, 4 ...
(b) Whole Numbers (W)
Numbers of the type 0, 1, 2, 3, 4 ...
(c) Integers (Z)
Numbers of the type ... - 3, - 2, - 1, 0, 1, 2, 3, 4 ...
(d) Rational Numbers (Q)
A number of the type p/q where p and q are integers and q ≠ 0.
(e) Irrational Numbers (I)
A (Real) number ‘i’ is called irrational if it cannot be written in the form p/q
where p and q are integers and q ≠ 0.
(f) Real Numbers (R)
Combination of real rational and irrational numbers
(g) Complex Numbers (C)
Numbers of the form a + bi where a, b are real numbers and i = squareroot - 1
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