Discrete Mathematics how to prove $(A\setminus B)\setminus C ⊆ A\setminus (B\setminus C)$
118239
If $A, B, C$ are sets prove that $(A\setminus B)\setminus C\subseteq A\setminus(B\setminus C)$
150738
Proof of $(A - B) - C = A - (B \cup C)$
77859
Prove or find a counter example to the claim that for all sets A,B,C if A ∩ B = B ∩ C = A ∩ C = Ø then A∩B∩C ≠ Ø
111951
Prove $\binom{n}{m}\binom{m}{k} = \binom{n}{k}\binom{n-k}{m-k}$
114780
$\forall a,b,c \in \mathbb{N}\!:\ a\mid b \Rightarrow ac\mid bc. $ Divisibility Proof
75199
$a \equiv b \pmod n$ and $c\equiv d \pmod n$ implies $ac \equiv bd \pmod n$
77286
Proving set theory question
61671
Discrete Math: Writing Proofs
123613
Double Complement of a set proof
135779
Prove the following: If $a \mid bc$, then $a \mid \gcd(a, b)c$.
25553
elementary set theory (cartesian product and symmetric difference proof)
145058
Prove $ (A \cup B) \cap C$ = $(A \cap C) \cup (B \cap C) $
151038
How to prove (A v B), (A → C), (B → D) therefore (C v D)
111003
Prove that if $A\triangle B = C\triangle B$, then $A = C$
59813
Prove that for all sets A and B, A ∩ B = ∅ implies ( A ∪ B ) - B = A
115606
Proofs involving $ (A\setminus B) \cup (A \cap B)$
31196
Prove $\binom{n}{a}\binom{n-a}{b-a} = \binom{n}{b}\binom{b}{a}$