NUMBER SYSTEM
1. NATURAL NO.(N) : All numbers in the count that begin at 1 and go to infinity , is called natural numbers. eg. 1,2,3,4,...........infinity . N={1,2,3,4,5,.......} ; A set of natural no. 2. WHOLE NO.(W): All numbers in the count that begin at 0 (zero) and go to infinity ,is called whole numbers. eg. 0 ,1 ,2, 3, ..........infinity . W={0,1,2,3,4,..........} ; A set of whole no. Note : N c W 3. INTEGERS (I or Z): when the negative numbers ,zero and positive numbers are represented on a number line from left to right respectively then these numbers are called integers. ____________________________________ ' ' ' ' ' ' ' ' eg. .........-4 , -3 ,-2 ,-1 , 0 , 1 , 2 ,3 ,......... I or Z={.........-4,-3,-2,-1,0,1,2,3,4,......} ; A se...