Learning Task 3
A. Prove the following using Direct Proof
1. Given: Odd and even integers
Prove: the sum of odd and even integers is odd integer
Solution:
Supply the missing statement and reason
2. Given odd integer m and even integer n ( m = 2k + 1 and n = 2k)
Prove: mn is even number ( mn = 2r)
3. Given: n is even number (n = 2k)
Prove: 3n + 5 is an odd number. ( 3n + 5 = 2m + 1)
