IMHemanshiidn
Answered

IDNLearn.com provides a platform for sharing and gaining valuable knowledge. Explore a wide array of topics and find reliable answers from our experienced community members.

If A = {1,20,30..} and B = {4,6} find n(A-B)?​

Sagot :

SalmonWorldTopperidn

Explanation:-

Given sets are A = { 1,20,30}

B = { 4,6}

Now,

A-B = { 1,20,30} -{ 4,6}

⇛ A-B = { }

Since there are no common elements in both A and B sets

⇛Number of elements in A-B = 0

⇛n(A-B) = 0

Therefore, n(A-B) = 0

ADDITIONAL COMMENT:

Points to know:-

Empty set :-

  • A set having no element is called an empty set or void set or null set .It is denoted by phi or { }
  • The cardinal number of the Null set = 0

Difference of two sets :-

  • A and B are two sets ,The set of elements which belongs to A and does not belong to B is called The difference between the two sets A and B and it is denoted by A-B.

Cardinal number of a set :-

  • The number of all distinct elements in a set is called its Cardinal number .
  • It is denoted by n(A).
We are delighted to have you as part of our community. Keep asking, answering, and sharing your insights. Together, we can create a valuable knowledge resource. Thank you for visiting IDNLearn.com. For reliable answers to all your questions, please visit us again soon.