To find an expression equivalent to \( \frac{1}{8^5} \), we can rewrite it using the properties of exponents.
The expression \( \frac{1}{8^5} \) can be rewritten as:
\[ 8^{-5} \]
Now let's look at the options you provided:
- \( 8^{-5} \)
- \( 8^{1/5} \)
- \( 5^{-8} \)
- \( 8^5 \)
The first option, \( 8^{-5} \), is indeed equivalent to \( \frac{1}{8^5} \).
Therefore, the correct answer is:
8^-5