Question

Write the given set in roster form: C = {x : x is a two-digit natural number such that the sum of its digits is 8}

Answer 1

as you know, there are two methods to represent a set.
(1) set builder form (2) roaster form or tabular form.
roaster form or tabular form :- in roaster form, all the elements of the set are listed, elements are being separated by commas and are enclosed within curly brackets { }.
for example :- A is set of all natural numbers
then we can write A in roaster from like as A = {1,2,3,4,..... }

here, C = {x : x is a two digit natural number such that the sum of its digits is 8}
if we assume unit digit of natural number is x
and tens digit is y
then, number is yx and y + x = 8
(x , y) = {(1,7) , (2, 6), (3, 5), (4, 4), (5, 3), (6, 2), (7, 1), (8, 0)}
then, numbers are 17, 26, 35, 44, 53, 62, 71, 80
now, roaster form : C = {17, 26, 35, 44, 53, 62, 71, 80}

Answer 2

Answer:

C = { 17,26,35,44,53,62,71,80 }

Step-by-step explanation:

Given set builder form :

C = { x : x is a two digit natural

number such that the sum of

it's digits is 8 }

Roster form :

C = { 17,26,35,44,53,62,71,80 }

••••