To evaluate the expression \(\ln\left(\sqrt{\frac{e^7}{e^5}}\right)\), we can simplify it step by step.
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First, simplify the fraction inside the square root: \[ \frac{e^7}{e^5} = e^{7-5} = e^2. \]
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Next, take the square root: \[ \sqrt{e^2} = e. \]
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Finally, evaluate the natural logarithm: \[ \ln(e) = 1. \]
Therefore, the final result is: \[ \ln\left(\sqrt{\frac{e^7}{e^5}}\right) = 1. \]
The answer is 1.