Дан фрагмент таблицы истинности выражения F.
|
x1 |
x2 |
x3 |
x4 |
x5 |
x6 |
x7 |
x8 |
F |
|
1 |
0 |
1 |
0 |
1 |
1 |
1 |
0 |
0 |
|
0 |
1 |
0 |
1 |
1 |
0 |
0 |
1 |
0 |
|
1 |
0 |
0 |
1 |
0 |
1 |
0 |
1 |
1 |
Какое выражение соответствует F?
1)
(x2 ->x1) and !x3 and x4 and !x5 and x6 and !x7 and x8
2)
(x2 -> x1) or !x3 or x4 or !x5 or x6 or !x7 or x8
3)
!(x2 -> x1) or x3 or !x4 or x5 or !x6 or x7 or !x8
4)
(x2 -> x1) and x3 and !x4 and x5 and !x6 and x7 and !x8