To apply the property of negative integer exponents, we first recall that \( a^{-n} = \frac{1}{a^n} \).
We have the expression:
\[ 3^{-1} 7^{-14} \]
We can apply the property to each term:
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For \( 3^{-1} \): \[ 3^{-1} = \frac{1}{3^1} = \frac{1}{3} \]
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For \( 7^{-14} \): \[ 7^{-14} = \frac{1}{7^{14}} \]
Now, substituting these into the expression gives us:
\[ 3^{-1} 7^{-14} = \frac{1}{3} \cdot \frac{1}{7^{14}} = \frac{1}{3 \cdot 7^{14}} \]
Therefore, the expression \( 3^{-1} 7^{-14} \) with positive exponents only is:
\[ \frac{1}{3 \cdot 7^{14}} \]