Advertisements
Advertisements
प्रश्न
Write the following sets in Roster form:
C = {x : x is composite number and 5 ≤ x ≤ 21}
उत्तर
C = {x : x is composite number and 5 < x < 21}
5 ≤ x ≤ 21 means x = 5, 6, 7, 8, 9, 10 ......, 21
But we are given that x is a complete number
∴ x = 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21
∴ Roster form of the given set C = {6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21}
Note: Composite numbers : The natural numbers (greater than 1), which are not prime, are called composite numbers.
APPEARS IN
संबंधित प्रश्न
Write the following sets in set-builder (Rule Method) form :
B3 = `{1/3, 3/5, 5/7, 7/9, 9/11, ....}`
Write the following sets in set-builder (Rule Method) form :
B4 = {8, 27, 64, 125, 216}
Write the following sets in set-builder (Rule Method) form :
B6 = {....., -6, -3, 0, 3, 6 ......}
List the elements of the following sets:
{x : x is a factor of 24}
List the elements of the following sets:
{x : 3x – 2 ≤ 10, x ∈ N}
List the elements of the following sets:
{x : 4 – 2x > -6, x ∈ Z}
Consider the following sets A = {0, 3, 5, 8}, B = {2, 4, 6, 10} and C = {12, 14, 18, 20}
0 ∈ B
Represent the following set in Roster form
C = {x : x is perfect cube, 27 < x < 216}
Represent the following set in Roster form
D = {x : x ∈ Z, −5 < x ≤ 2}
Represent the following set in set builder form
E = The set of odd Whole numbers less than 9.
