To solve the logarithmic expression \(\log_{m} m^{n}\), we can use the logarithm power rule, which states that \(\log_{b} (a^c) = c \cdot \log_{b} a\). In this case, since the base \(m\) and the argument \(m^n\) are the same, the expression simplifies to \(n\).
Step 1: Identify the Expression
We start with the expression \(\log_{m} m^{n}\).
Step 2: Apply the Logarithm Power Rule
Using the logarithm power rule, we have:
\[
\log_{b} (a^c) = c \cdot \log_{b} a
\]
In our case, this simplifies to:
\[
\log_{m} m^{n} = n \cdot \log_{m} m
\]
Step 3: Simplify the Expression
Since \(\log_{m} m = 1\), we can further simplify:
\[
\log_{m} m^{n} = n \cdot 1 = n
\]
Step 4: Substitute the Value of \(n\)
Given \(n = 3\), we find:
\[
\log_{m} m^{n} = 3
\]