CBSE Boardहिन्दी माध्यमकक्षा 11 साइन्सगणितसमुच्चय5 Marks
Question
दिखाइए कि यदि A $\subset$ B, तो C - B $\subset$ C - A.
✓
Answer
माना x $\in$ C - B $\Rightarrow x \in$ C और x $\notin$ B $\Rightarrow x \in$ C और x $\notin$ A ($\because A \subset$ B) $\Rightarrow x \in$ C - A $\therefore$ C - B $\subset$ C - A
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