Q3 of 145 Page 4

Write the following sets in roster from:

B = {x : x is an integer and –4 < x < 6}.


Integers = …-6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7,…

The elements of this set are -3, -2, -1, 0, 1, 2, 3, 4 and 5 only.


So, B = {-3, -2, -1, 0, 1, 2, 3, 4, 5}


More from this chapter

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2

Let A be the set of all even whole numbers less than 10.

(i) Write A in the roster from.


(ii) Fill in the blanks with the approximate symbol ∉ or ϵ :


(a) 0 …. A


(b) 10 …. A


(c) 3 …. A


(d) 6 …. A


 3

Write the following sets in roster from:

A = {x : x is a natural number, 30 ≤ x < 36}.


 3

Write the following sets in roster from:

C = {x : x is a two-digit number such that the sum of its digits is 9}.


 3

Write the following sets in roster from:

D = {x : x is an integer, x2 ≤ 9}.