What does 8 root 2.5 ($\sqrt[8]{2.5}$) mean?

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$8$ root of $2.5$?

I have calculated the equation and found $12.6$ is the answer. However, the answer given is $1.12$

so what could I have done wrong? Thanks

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The $8^{th}$ root of $2.5$ is expressed as $\sqrt[8]{2.5}$ or $2.5^{\frac18}$, which is approximately $1.12$.