Answer:
a(n) = 4⁽ⁿ⁻¹⁾ is the answer :))))) goodluck!
Explanation:
a₁ = 1 = 4⁰
a₂ = 4 =4¹
a₃ =4 x 4=4²
a₄ =4 x 4² =4³
a(n) = 4⁽ⁿ⁻¹⁾
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