Question

$( \frac{2}{5} )$ ˣ⁻¹ = $\frac{125}{8}$

Answer 1

Olá Bickhoney

(2/5)^(x - 1) = 125/8 

(5/2)^(1 - x) = (5/2)^3

1 - x = 3

x = 1 - 3 = -2

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