Word Count : 269

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हमारे पास दो समुच्चय (S) और (T) हैं। हमें यह दिखाना है कि [ S \cup T = (S - T) \cup (S \cap T) \cup (T - S). ] किसी भी तत्व (x) के लिए यह साबित करना पर्याप्त है। सबसे पहले बाएँ और दाएँ पक्ष पर विचार करें। 1. यदि (x \in S \cup T), तो या तो (x \in S) है या (x \in _________ ____ _________ ____ _______ ________ ________.
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