Evaluate the sum ₖ=₁Σ∞ 4(1/5)ᵏ-¹ . You should give an exact

Last updated: 7/30/2022

Evaluate the sum ₖ=₁Σ∞ 4(1/5)ᵏ-¹ . You should give an exact answer (as a fraction), not a decimal approximation.