Maths-
General
Easy
Question
The roster form of the set A = {x : x 
N, x < 8} is
- A = {1, 2, 3, 4, 5, 6, 7}
- A = {1, 8}
- A = {1, 2, 8}
- A = {3, 4, 8}
Hint:
We are given a set builder form of a set A. We have to find the roster form or in other words elements of the set A in a curly bracket.
The correct answer is: A = {1, 2, 3, 4, 5, 6, 7}
The given set is
A = { x : x ∈ N, x < 8}
We have to write the given set in roster form. It means we have to write all the elements in the set A.
The above set shows two conditions on x.
The first one x ∈ N means x belongs to the set of natural numbers. The natural numbers start from 1 to positive infinity.
The second condition is x < 8. It means x should be less than 8.
The numbers which are less than 8 and belong to set of natural numbers are
1, 2, 3, 4, 5, 6, 7
So, the roster form of the set will be
A = { 1, 2, 3, 4, 5, 6, 7 }
Roster form gives us list of all elements of the sets. Set builder form gives the details of the set in compact form.
Related Questions to study
chemistry-
The appropriate reagent for the following transformation is:
The appropriate reagent for the following transformation is:
chemistry-General
chemistry-
The oxidation number of Pt in 
is
The oxidation number of Pt in is
chemistry-General
physics-
A particular emission line, detected in the light from a galaxy, has a wavelength 
, where 
is the proper wavelength of the line. The galaxy distance from us
A particular emission line, detected in the light from a galaxy, has a wavelength , where is the proper wavelength of the line. The galaxy distance from us
physics-General
chemistry-
Identify the set from the following which cannot form acetone in a single –step reaction
Identify the set from the following which cannot form acetone in a single –step reaction
chemistry-General
chemistry-
(A) is:
(A) is:
chemistry-General
physics-
A beam of light AO is incident on a glass slab 
in a direction as shown in figure. The reflected ray OB is passed through a Nicol prism on viewing through a Nicole prism, we find on rotating the prism that
A beam of light AO is incident on a glass slab in a direction as shown in figure. The reflected ray OB is passed through a Nicol prism on viewing through a Nicole prism, we find on rotating the prism that
physics-General
chemistry-
The products (A) and (B) are:
The products (A) and (B) are:
chemistry-General
chemistry-
The products (B) and (C) are:
The products (B) and (C) are:
chemistry-General
Maths-
If Z = aX + bY and r is the correlation coefficient between X and Y, then 
is equal to -
If Z = aX + bY and r is the correlation coefficient between X and Y, then is equal to -
Maths-General
maths-
The imaginary part of 
is-
The imaginary part of is-
maths-General
maths-
If the lines 
and 
are concurrent, then the value of l is
If the lines and are concurrent, then the value of l is
maths-General
maths-
A: The product of the perpendiculars from 
B: The product of perpendiculars from (1,1) to the pair of lines 
C: The product of perpendiculars from (0,0) to pair of lines 
D: The square of the distance from (0,0) to the point of intersection of 
Arrange A,B,C,D in ascending order
A: The product of the perpendiculars from
B: The product of perpendiculars from (1,1) to the pair of lines
C: The product of perpendiculars from (0,0) to pair of lines
D: The square of the distance from (0,0) to the point of intersection of Arrange A,B,C,D in ascending order
maths-General
maths-
If the equation 
represents a pair of straight lines, then the square of the distance of their point of intersection from the origin is
If the equation represents a pair of straight lines, then the square of the distance of their point of intersection from the origin is
maths-General
maths-
denotes a pair of straight lines, then the point of intersection of the lines is
denotes a pair of straight lines, then the point of intersection of the lines is
maths-General
maths-
The point of intersection of the straight lines represented by 
The point of intersection of the straight lines represented by
maths-General
