Q-3: a) State the inverse and contrapositive of the statement "We leave whenever he comes". b) Let A, B and C be sets. Prove that A – (A – B) = A n B. c) Find all m 2 1 such that 27 = 9 (mod m).

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Disceret mathematics 

Q-3:
a) State the inverse and contrapositive of the statement "We leave whenever
he comes".
b) Let A, B and C be sets. Prove that A – (A – B) = AnB.
c) Find all m > 1 such that 27 = 9 (mod m).
Transcribed Image Text:Q-3: a) State the inverse and contrapositive of the statement "We leave whenever he comes". b) Let A, B and C be sets. Prove that A – (A – B) = AnB. c) Find all m > 1 such that 27 = 9 (mod m).
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