Using differentials, find the approximate value of each of the following:
(a)`(17/81)^(1/4)" "(b) (33)^(-1/5)`

Explanation

To find the approximate values of \( \left( \frac{17}{81} \right)^{1/4} \) and \( 33^{-1/5} \) using differentials, we can follow these steps:

### Part (a): Approximate \( \left( \frac{17}{81} \right)^{1/4} \)

1. **Define the function**:
Let \( f(x) = x^{1/4} \).

2. **Find the derivative**:
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