Let
\[
f(x)=\frac{|x|-1}{|x-1|}
\]
be a real valued function from \( \mathbb{R}-\{1\} \) to \(B\). If \(f\) is a surjection, then \(B=\)
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To find the codomain of a surjective function, first determine its range. For modulus functions, split the domain at points where the expressions inside the modulus become zero.