Ononot — Let \chiS(x) denote the characteristic function of set S, wh

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Set Theoryhard

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Let $\chi_S(x)$ denote the characteristic function of set $S$ , where $\chi_S(x) = 1$ if $x \in S$ and $\chi_S(x) = 0$ if $x \notin S$ . For three sets $A, B, C$ , let $T = (A \setminus B) \setminus C$ . Which of the following expressions is equivalent to $\chi_T(x)$ for all $x$ ?