Find `f(0)` , so that `f(x)=x/(1-sqrt(1-x))` becomes continuous at `x=0` .

Explanation

To find \( f(0) \) such that the function \( f(x) = \frac{x}{1 - \sqrt{1 - x}} \) is continuous at \( x = 0 \), we need to evaluate the limit of \( f(x) \) as \( x \) approaches 0.

### Step-by-Step Solution:

1. **Evaluate the limit as \( x \) approaches 0:**
\[ \lim_{x \to 0} f(x) = \lim_{x \to 0} \frac{x}{1 - \sqrt{1 - x}} \]
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