Hán Quang Dũng
01/07/2018 at 02:10-
Form the four numbers a,b,c,d. We have: \(a,b,c,d\in N\)
=> \(a+b+c+d+1>0+1>1\) (because a,b,c,d are consecutive number so their sum isn't 0)
=> PROVED
Form the four numbers a,b,c,d. We have: \(a,b,c,d\in N\)
=> \(a+b+c+d+1>0+1>1\) (because a,b,c,d are consecutive number so their sum isn't 0)
=> PROVED