3. Let a, b, c € Z. Prove that if a³|b and b5 | c, then a¹5| c. 4 Prove that for any n = 7 3m² + 112 + 15 is odd

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3. Let a, b, c € Z. Prove that if a³ | b and b5 | c, then a¹5 | c.
4. Prove that for any n e Z, 3n² +11n + 15 is odd.
Transcribed Image Text:3. Let a, b, c € Z. Prove that if a³ | b and b5 | c, then a¹5 | c. 4. Prove that for any n e Z, 3n² +11n + 15 is odd.
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