Question

Write the set A { x:x= n²} in roaster form

Answer 1

Answer:

{1,4,9,16.... } if x belongs to N

here data is incomplete.x belongs to which set ???

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Answer 2

Corection:—

Write the following set in roster form also write its cardinal number A={x/x=3n;n∈Nandn<8}

ANSWER

x=3n

where n is a natural number and n<8

So, n can be any digit from 1,2,3,4,5,6,7

So, in roster form

A={3,6,9,12,15,18,21}

Cardinal number = no. of distinct elements in the Set=7

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