Question

What is sets ? this is from 11 class maths ncert book chapter 01​

Answer 1

Step-by-step explanation:

HEY MATE ......

Sets are represented as a collection of well-defined objects or elements and it does not change from person to person.

A set is represented by a capital letter. The number of elements in the finite set is known as the cardinal number of a set.

Sets Formulas:

Some of the most important set formulas are:

For any three sets A, B and C

▶️n ( A ∪ B ) = n(A) + n(B) – n ( A ∩ B)

▶️If A ∩ B = ∅, then n ( A ∪ B ) = n(A) + n(B)

▶️n( A – B) + n( A ∩ B ) = n(A)

▶️n( B – A) + n( A ∩ B ) = n(B)

▶️n( A – B) + n ( A ∩ B) + n( B – A) = n ( A ∪ B )

▶️n ( A ∪ B ∪ C ) = n(A) + n(B) + n(C) – n ( A ∩ B) – n ( B ∩ C) – n ( C ∩ A) + n ( A ∩ B ∩ C).

HOPE IT HELPS YOU