Niloct
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 Oct 1 comment Proving : $A \cap (B-C) = (A \cap B) - (A \cap C)$ Hi @Marnix! It was a bit odd to read your comment years after posting, but then I think you've a point. But as I said in my answer, I tried to simplify :) the notation of your answer, using sets. As I see, your answer also has a trick point in which the reader has to understand how a left value is carried to the expression inside brackets. I think both answers are good. May 14 awarded Teacher Jul 25 awarded Editor Jul 25 revised Proving : $A \cap (B-C) = (A \cap B) - (A \cap C)$ fixed explanation of disjointed set. Jul 24 answered Proving : $A \cap (B-C) = (A \cap B) - (A \cap C)$ Dec 10 awarded Scholar Dec 10 accepted Explanation of the inequality $\sum_{k=1}^{n} 1/k \le 1 + \int_1^n(1/x) \, \mathrm{d} x$ Dec 9 awarded Student Dec 5 asked Explanation of the inequality $\sum_{k=1}^{n} 1/k \le 1 + \int_1^n(1/x) \, \mathrm{d} x$ Dec 5 awarded Supporter