Final answer:
The request appears to contain a mistake, as the function 'f(x)' provided does not yield 'f(1/2)=8'. Clarification is needed for an accurate response.
Step-by-step explanation:
The original question seems to have a typo or a misprint, as 'f(1/2)=8' does not relate directly to finding the function 'f'. Instead, what we can infer from the question is that we need to define the function 'f(x)' based on the provided expression 'f(x)=2/square root of 1-x²'. Assuming this expression is correct, the given value 'f(1/2)=8' does not hold true as the function 'f' evaluates to a different number when 'x = 1/2'. We also note that the other pieces of information relating to quadratic equations, graphs, and other math problems seem unrelated to this specific question about the function 'f(x)'.