Let f(x^2/3). Find f(S) if S = {1,5,7,11}.

To find f(S) where S = {1, 5, 7, 11} and f(x^2/3) is given, we need to substitute each element of S into the function f(x^2/3) and evaluate the expression.

Let's go step by step:

1. Substitute the first element of S, which is 1, into the function f(x^2/3):
f(1^2/3) = f(1^(2/3))

2. Simplify the exponent:
f(1^(2/3)) = f(1^(2/3)) = f(1^(2/3)) = f(1)

3. Repeat the same process for each element of S:
f(5^(2/3))
f(7^(2/3))
f(11^(2/3))

Now, to find the value of each expression f(1), f(5), f(7), and f(11), we might need additional information about the definition or values of the function f. If you can provide more details about the function or any specific instructions, I can help you further in evaluating f(S).