Question

write the fundamental theorem of sets A and B​

Answer 1

Answer:

n(AUB) =n(A) +n(B) -n(A intersection B)

Answer 2

Answer:

Step-by-step explanation:

In our mathematical language , everything in this universe , wherther living or non-living is called an object.

SET- A well define collection of objects is called a set.

      ex- the collection of all vowels in english alphabet contains five    elements namely a,e,i,o,u.

   So, this collection is well define and therefore it is a set.

There are two methods of describing a set.

(i) Roster form or Tabulation method- Under this method, we list all the members of the set within braces { } and seperate them by commas.

ex- A= set of all factors of 24.

     A = { 1, 2, 3, 4, 6, 8, 12, 24 }

(ii) Set-Builder Form- Under  this method of describing a set , we list the property or properties satisfied by all the elements of the set.

ex- set A = { 1, 2, 3, 4, 5, 6, 7 } in the set - builder form .

           A = { x : x ∈ N and x < 8 }

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