To rewrite the expression \( 14^{-7} / 9^{-13} \) using only positive exponents, we can apply the property of negative exponents, which states that \( a^{-n} = \frac{1}{a^n} \).
Starting with:
\[ \frac{14^{-7}}{9^{-13}} \]
We can apply the negative exponent rule:
- Rewrite \( 14^{-7} \) as \( \frac{1}{14^7} \).
- Rewrite \( 9^{-13} \) as \( \frac{1}{9^{13}} \).
Thus:
\[ \frac{14^{-7}}{9^{-13}} = \frac{\frac{1}{14^7}}{\frac{1}{9^{13}}} \]
When dividing by a fraction, it is equivalent to multiplying by the reciprocal:
\[ \frac{1}{14^7} \cdot \frac{9^{13}}{1} = \frac{9^{13}}{14^7} \]
Therefore, an equivalent expression using only positive exponents is:
\[ \frac{9^{13}}{14^7} \]
In the provided options, this corresponds to:
\[ \frac{9^{13}}{14^{7}} \]
So the correct answer is:
\(\frac{9^{13}}{14^{7}}\)