Question

15. Write the following intervals in set - Bulud
16. Write the following sets in roster form:A = {x:x is an odd prime number less than 25}
17. Write the following sets in roster form:C= {x:x is an integer and x2 - 16 = 0}​

Answer 1

Step-by-step explanation:

Given :-

A = {x:x is an odd prime number less than 25}

C= {x:x is an integer and x² - 16 = 0}

To find :-

Write the sets in the roster form?

Solution :-

Given that:

A = {x:x is an odd prime number less than 25}

The odd numbers less than 25 = 1,3,5,7,9,11,13,15,17,19,21,23

The prime numbers less than 25 = 2,3,5,7,11,13,17,19,23

The odd prime numbers less than 25 = 3,5,7,11,13,17,19,23

So , Roster form of the set A ={3,5,7,11,13,17,19,23}

and

Given set: C= {x:x is an integer and x² - 16 = 0}

x²-16 = 0

=> x² = 16

=> x = ±√16

=> x = ±4

=> x = 4 or -4

So, The roster form of the set C ={ -4,4}

Answer:-

The Roster form of the set A ={3,5,7,11,13,17,19,23}

The Roster form of the set C ={ -4,4}

Used formulae:-

• In the roster form we write the list of elements seperating with commas within the braces.
• It is also called List form.