To find the value of the function for a given \(x\), we first adjust the input by adding \(a\) to it. Thus, the new input for the cube root operation is \(x + a = -125 = -125\).
Next, we calculate the cube root of \(x + a\), which is \(\sqrt[3]{-125}\). For our calculation, this value is \(-5\).
Finally, we add \(b\) to the result of the cube root calculation to get the final output, \(f(x) = \sqrt[3]{-125} - 1 = -6\).