definition

☼ To  find L. C. M.   of  Given  Numbers  :

■ L. C. M.   by  Definition  :  Write all the multiples  of   each  number and  take common multiples  of  all multiples  and  then  select  the least  …

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☼ To find H.C.F. of  Given Numbers :

■ H. C. F.  by  Definition  :  Write all the factors (divisors) of   each number and  take common factors (divisors)  of  all factors (divisors)  and then sele…

☼ Factors & Multiples : If   ‘a’   divides  ‘b’  exactly, then we say that  ‘a’  is a factor of  ‘b’  and  we write,  a | b.  In this case,  ‘b’  is called  a  multiple of   ‘a’.

☼ An  Important  Result   :   …

(6) Let  A  =  { – 1, 0, 1, 2 }  and  B  =  { 0, 1, 4, 9, 16, 25 }    &     f : A  B

Let…