# Roster Form

## Trending Questions

**Q.**

The domain and range of the relation R given by R $=\left\{(x,y):y=x+\frac{6}{x},\mathrm{where}x,y\in N\mathrm{and}x<6\right\}$ is

$\left\{1,2,3\right\},\left\{7,5\right\}$

$\left\{1,2\right\},\left\{7,5\right\}$

$\left\{2,3\right\},\left\{5\right\}$

None of these

**Q.**Write the set {x:x is a positive integer and x2<40} in the roster form.

**Q.**Write the solution set of the equation x2+x−2=0 in roster form.

**Q.**

How to send pictures of a math problem? Please give a tutorial

**Q.**If A={1, 2, 3, 4, 5} then which of the following is correct?

- ϕ∈A
- 3∉A
- {2}∈A
- 4∈A

**Q.**The roster form of the set {x:x is a real number and x3=3x2−2x}

- {1, 2}
- {1, 2, ϕ}
- {0, 1, 2}
- {0, ϕ, 1, 2, 3}

**Q.**The roster form of the set {x:x is a two-digit natural number such that sum of its digits is 9}

- (09, 18, 27, 36, 45, 54, 63, 72, 81, 90)
- {09, 18, 27, 36, 45, 54, 63, 72, 81, 90}
- [09, 18, 27, 36, 45, 54, 63, 72, 81, 90]
- {18, 27, 36, 45, 54, 63, 72, 81, 90}

**Q.**Which of the following is roster form of {x:x is even prime number greater than 2}?

- {0}
- 0
- {}
- {2}

**Q.**Prove that 2n>n for all positive integers n.

**Q.**I have a problem in maths. i understand all the concepts but m not able to solve questions during exam Can u give me tips and suggestions to improve it....

**Q.**

Describe the following sets in Roster form :

(i) {x : x is a letter before e in the English alphabet}.

(ii) {x ϵ N:x2<25}

(iii) {x ϵ N: x is a prime number, 10 < x < 20}.

(iv) x ϵ N:x=2n, nϵN.

(v) x ϵ R:x>x.

(vi) {x : x is a prime number which is a divisor of 60}

(vii) {x : x ix a two digit number such that the sum of its digits is 8}.

(viii) The set of all letters in the word ' Trigonometry'.

(ix) The set of all letters in the word 'Better'.

**Q.**

Let A = {1, 2, 3, 5}, B = {4, 6, 9} and R be a relation from A to B defined by R = {(x, y) : x - y is odd}. Write R in roster form.

**Q.**

There are 15 chocolates be distributed among 3 children subject to condition that child can take any number of chocolates. Find the required number of ways to do this if chocolates are distinct.

**Q.**

How many onto functions from set A to set A can be formed for the set A = { 1, 2, 3, 4, 5, ......n} ?

n

^{2}2n

n

n!

**Q.**Express the given sets in roster form:

(v) S = {Squares of first eight whole numbers}.

**Q.**The number of distinct arrangements that can be made by using all the letters of the word ′ASPIRANTS′ such that the word begins with T is

- 10080
- 10180
- 11180
- 12080

**Q.**

Write
the relation R = {(*x*,
*x*^{3}):
*x
*is
a prime number less than 10} in roster form.

**Q.**In roster notation of a set

- order of elements is important
- elements represented in square brackets
- all elements will posses common property
- none of the above

**Q.**Describe the following set in Roster form:

(vi) {x:x is a prime number which is a divisor of 60 }

**Q.**

What is well defined collection of an object with an example

**Q.**Which of the following is correct notation?

- ∈→ there exist
- ∀→ for all
- :→ belongs to
- ∃→ such that

**Q.**Show that the set of letters needed to spell CATARACT and the set of letters needed to spell TRACT are equal.

**Q.**Can I have some CBSE board question papers of maths

**Q.**In roster notation of a set

- order of elements is important
- elements represented in square brackets
- all elements will posses common property
- none of the above

**Q.**

Write each given set in the Set Builder Form.

$\left\{4,8,12,16,20,24,.......\right\}$

**Q.**What are normal or representative elements and their properties

**Q.**

What is the cardinal number of following sets?

The set of prime number less than $10$

**Q.**

If $\mathrm{A}$ is the set of the divisors of the number $15$, $\mathrm{B}$ is the set of prime numbers smaller than $10$ and $\mathrm{C}$ is the set of even numbers smaller than $9$, then $(\mathrm{A}\cup \mathrm{C})\cap \mathrm{B}$ is?

**Q.**Choose an appropriate word from the options to suitably fill the blank so that the sentence makes sense, both grammatically and contextually.

Do you think that flying an airplane is a _______ experience?

- terrified
- terrifying
- terrify
- terror

**Q.**What are fundamental concept of set ?