# Write the Following Sets in Roster Form : B = {P : P ∈ W and P2 < 20} - Mathematics

Sum

Write the following sets in Roster form:

B = {p : p ∈ W and p2 < 20}

#### Solution

B = {P : P ∈ W and p2 < 20}
When p2 = 0
P = sqrt(0) = 0

When p2 = 1
P = sqrt(1) = 1

When p2 = 4
P = sqrt(4) = 2

When p2 = 9
P = sqrt(9) = 3

When p2 = 16
P = sqrt(16) = 4

∴ Roster form of the given set B = {0, 1, 2, 3, 4}

Concept: Representation of a Set
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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 6 Sets
Exercise 6 (A) | Q 4.4 | Page 65