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	Direct Math Proof: If n is odd then 3n + 7 is even (The Math Sorcerer) View
	Direct Proof: For all integers n, if n is odd then 3n + 5 is even (An Luu) View
	Proof: n is Odd if and only if 3n+5 is Even (Wrath of Math) View
	Proof by Contradiction: if 3n+2 is odd then n is odd (Computer Science Notes) View
	Example: Proof by Contraposition [3] (Justin Ryan) View
	2 - Direct Proof (a-cube) View
	Proof by Contradiction \| Method u0026 First Example (Dr. Trefor Bazett) View
	Example: Proof by Contradiction [2] (Justin Ryan) View
	Direct proofs: example 2 (dmkoslicki) View
	Direct Proofs (Mr Naik Math) View