Question

If A={3,9,27,81}, then write A in the set builder form
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Answer 1

SOLUTION

TO EXPRESS

A = { 3 , 9 , 27 , 81 } in the set builder form

CONCEPT TO BE IMPLEMENTED

SET

A set is a well defined collection of distinct objects

REPRESENTATION OF SET

A Set can be represented in following ways

• Tabular or Roster form

• Set Builder form

EVALUATION

Here the given set is

A = { 3 , 9 , 27 , 81 }

Now every element of the set is multiple of 3

So the set in the set builder form is

$\sf{A = \{ \: {n}^{3} : \: n = 1,2,3,4 \: \}}$

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