दिखलाइए कि \( \mathrm{A} \cap \mathrm{B}=\mathrm{A} \cap \mathrm{C} \) का तात्पर्य \( \mathrm{B}...

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दिखलाइए कि \( \mathrm{A} \cap \mathrm{B}=\mathrm{A} \cap \mathrm{C} \) का तात्पर्य \( \mathrm{B}=\mathrm{C} \) आवश्यक रूप से नहीं होता है।
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