Дан фрагмент таблицы истинности выражения F.
|
x1 |
x2 |
x3 |
x4 |
x5 |
x6 |
x7 |
F |
|
0 |
1 |
0 |
1 |
1 |
1 |
0 |
1 |
|
1 |
0 |
1 |
1 |
0 |
0 |
1 |
1 |
|
0 |
1 |
0 |
1 |
0 |
1 |
0 |
0 |
Какое выражение соответствует F?
1)
x1 and !x2 and x3 and !x4 and x5 and !x6 and x7
2)
x1 or !x2 or x3 or !x4 or x5 or !x6 or x7
3)
!x1 and x2 and !x3 and x4 and !x5 and x6 and !x7
4)
!x1 or x2 or !x3 or x4 or !x5 or x6 or !x7