Posted by **Math help** on Thursday, February 21, 2008 at 11:07am.

1. Assume that n is a positive integer. Use the proof by contradiction method to prove:

If 7n + 4 is an even integer then n is an even integer.

2. Prove: n is an even integer iff 7n + 4 is an even integer. (Note this is an if and only if (iff) statement.

## Answer This Question

## Related Questions

- discrete math - Prove by contradiction that for any even integer a and any odd ...
- discrete math - prove that if n is an integer and 3n+2 is even, then n is even ...
- discrete math - 1)prove that if x is rational and x not equal to 0, then 1/x is ...
- mat advance analysis - True or False: If a|b and a|(b + 1), then a = ±1. [NOTE: ...
- Algebra - The sum of two consecutive even integers is 118. A. Define a variable ...
- DISCRETE MATHS - We need to show that 4 divides 1-n2 whenever n is an odd ...
- math - the sum of an even integer and twice the next greater even integer is the...
- Discrete Math - If n is a positive integer and n > 1,prove that (n) + (n-1) ...
- elementary math - i did use my poof to prove. im not sure im doing right. here ...
- Math - Find three consecutive even integers such that the sum of the smallest ...

More Related Questions