- #1
yanjt
- 14
- 0
Hi,
I have no idea on how to start to do this question.
If the square of an integer is even,then the integer itself is even
I try to check some books but i can't get any similar examples.I wonder if I can directly prove the n=2k, n^2 = 2(2k^2).
Thanks!
I have no idea on how to start to do this question.
If the square of an integer is even,then the integer itself is even
I try to check some books but i can't get any similar examples.I wonder if I can directly prove the n=2k, n^2 = 2(2k^2).
Thanks!