Q2 of 43 Page 3

Write the following symbolic statements in words.

i. 4/3 ∈ Q


ii. - 2 N


iii. P = {P is an odd number}

i. We know that Q is denoted as set of rational numbers.


We write 4/3 ∈ Q as ‘4/3 is an element of set of rational numbers’.


ii. We know that N is denoted as set of natural numbers.


We write -2 N as ‘-2 is not an element of set of natural numbers.’


iii. We write P = {p| p is an odd number} as ‘Set P contains all the odd numbers’.


More from this chapter

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1

Write the following sets in roster form. We know that in roster method, we write all the elements of a set in curly bracket. Each of the element is written only once and separated by commas. The order of an element is not important but it is necessary to write all the elements of the set.

i. Set of even numbers


ii. Set of even prime numbers from 1 to 50


iii. Set of negative integers


iv. Seven basic sounds of a sargam (sur)

 3

Write any two sets by listing method and by rule method.

 4

Write the following sets using listing method.

i. All months in the Indian solar year.


ii. Letters in the word ‘COMPLEMENT’.


iii. Set of human sensory organs.


iv. Set of prime numbers from 1 to 20.


v. Names of continents of the world.

 5

Write the following sets using rule method. We know that in rule method, we do not write the list of elements but write the general element using variable followed by a vertical line or colon and write the property of the variable.

i. A = {1,4,9,16,25,36,49,64,81,100}


ii. B = {6,12,18,24,30,36,42,48}


iii. C = {S, M, I, L, E}


iv. D = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}