Question

{1,3,9,27,81} write in set builder ​

Answer 1

Answer:

{x : x = 3^n , 0≤n≤4}

explanation :

notice the pattern?

1 = 3⁰

3 = 3¹

9 = 3²

27= 3³

81 = 3⁴

therefore, x = 3^n, where n is a whole number lesser than or equal to 4.