Final answer:
The question is about evaluating a function with the formula f(x) = (1/2)x^(1/2) over an interval that is mentioned as 4,9. The exact requirement is unclear, however, for a specific value within the interval, the function can be evaluated by substitution.
Step-by-step explanation:
The question seems to address the function f(x) = \frac{1}{2}x^{\frac{1}{2}} and asks for evaluation over an interval, possibly [4,9]. However, the question appears incomplete, as it is not clear what 'value' is being referred to (e.g., average value, function value at a specific point in the interval, etc.). Without additional context or a specific query, we can only explain that to evaluate this function within the given interval, one would plug in values of x from the interval into the function and solve accordingly. For example, if x is 4: f(4) = \frac{1}{2}(4)^{\frac{1}{2}} = \frac{1}{2}(2) = 1.