Question

Write the set B = {x : x is a natural number and x² < 40} in the roster form.

Answer 1

Given

B = {x : x is a natural number and x² < 40}

x =1

$x^{2} =1^{2} =1$

x=2

$x^{2} =2^{2} =4$

x=3

$x^{2} =3^{2} =9$

x=4

$x^{2} =4^{2} =16$

x=5

$x^{2} =5^{2} =25$

x=6

$x^{2} =6^{2} =36$

x=7

$x^{2} =7^{2} =49$ (x² > 40)    [excluded]

So,

Set in roster form {1,2,3,4,5,6}.

x

Answer 2

Step-by-step explanation:

if we take x= 7

then x² = 7²= 49 [it so excluded]