Prove or disprove the following: (a) The sum of two even integers is an even integer. (b)
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Prove or disprove the following:
(a) The sum of two even integers is an even integer.
(b) The sum of two odd integers is an odd integer.
(c) The sum of two primes is never a prime.
(d) The sum of three consecutive integers is divisible by 3. Indicate the methods of proof where appropriate.
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