f A = {3,9,27,81}, then write A in the set builder form.
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This is a question of set theory.
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Answer:
A = {x : x = 3^n, n∈N, 1≤n≤4}
Step-by-step explanation:
A = The set of all x such that x is equal to 3 to the power n, where n is a natural number greater than or equal to 1, and lesser than or equal to 4
( We can write 3, 9, 27, 81 as 3^1, 3^2, 3^3, 3^4 respectively )
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