Basic Ideas of Set

Which of the following best describes set?

• collection of objects

• group of objects

• collection of distinct objects

• well-defined collection of distinct object

A set notation that describes a set in words

(a)  

A set notation that enumerates the elements of the set, enclosed by braces, and separated by commas.

(a)  

A set notation that describes a set by rule rather than the actual elements.

(a)  

A set with exact number of elements.

• Finite Set

• Infinite Set

• Equal Set

• Equivalent Set

Sets with the same cardinality.

• Finite Set

• Infinite Set

• Equal Set

• Equivalent Set

Sets with exactly the same elements.

• Finite set

• Infinite Set

• Equal Set

• Equivalent set

A={m,a,t,h}

B={1,2,3,4}

A=B

• TRUE

• FALSE

A={m,a,t,h}
B={1,2,3,4}

 $A\approx B$  

• TRUE

• FALSE

Consider set A below:

A={3,4,5,6,7,8,9,...25}

Find

 $n\left(A\right)$  

(a)