Дан фрагмент таблицы истинности выражения F.
|
x1 |
x2 |
x3 |
x4 |
x5 |
x6 |
x7 |
F |
|
0 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
|
1 |
0 |
1 |
0 |
1 |
1 |
0 |
0 |
|
0 |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
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