Respuesta :

Given data:

The given geometric series is 0.25, 1.25, 6.25, 31.25, ...​

The expression for the common ratio is,

[tex]\begin{gathered} r=\frac{1.25}{0.25} \\ =5 \end{gathered}[/tex]

Thus, the common ratio is 5, so first option is correct.

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