To explore the continuity of the given piecewise function \( f(x) \), we need to check the limit of \( f(x) \) as \( x \) approaches 0 from the positive side and compare it with the value of \( f(x) \) at \( x = 0 \). If both are equal, the function is continuous at \( x = 0 \).
Step 1: Define the Function
The piecewise function is defined as follows:
\[
f(x) =
\begin{cases}
(3x + 1)^{\frac{1}{2x}}, & x > 0 \\
\sqrt{x}, & x = 0
\end{cases}
\]
Step 2: Calculate the Limit from the Right
To check the continuity at \( x = 0 \), we need to find the limit of \( f(x) \) as \( x \) approaches 0 from the right:
\[
\lim_{x \to 0^+} f(x) = \lim_{x \to 0^+} (3x + 1)^{\frac{1}{2x}} = e^{\frac{3}{2}}
\]
Step 3: Evaluate the Function at \( x = 0 \)
Next, we evaluate the function at \( x = 0 \):
\[
f(0) = \sqrt{0} = 0
\]
Step 4: Check for Continuity
For the function to be continuous at \( x = 0 \), the limit from the right must equal the value of the function at that point:
\[
e^{\frac{3}{2}} \neq 0
\]
Since the limit does not equal the function value, the function is not continuous at \( x = 0 \).
Final Answer
The function is not continuous at \( x = 0 \), so the final answer is:
\[
\boxed{\text{Not continuous at } x = 0}
\]