To solve for the missing exponent in the equation \(\frac{e^x}{e^{65}} = e^{38}\), we can use the properties of exponents.
Using the property \(\frac{e^a}{e^b} = e^{a-b}\), we rewrite the left-hand side:
\[ \frac{e^x}{e^{65}} = e^{x - 65} \]
Now we can set the exponents equal to each other, since the equation states:
\[ e^{x - 65} = e^{38} \]
This implies:
\[ x - 65 = 38 \]
To solve for \(x\), we add 65 to both sides:
\[ x = 38 + 65 \]
\[ x = 103 \]
Therefore, the missing exponent is \(103\).