2 |
3 |
BP |
BA |
BC |
AB |
AC |
| ||
4 |
2 |
3 |
2+(
| ||||
2×
|
| ||
2 |
AB |
AC |
AB |
AC |
3 |
BP |
BA |
BC |
BP |
BA |
BC |
BA |
AP |
AC |
AP |
AC |
1 |
2 |
1 |
2 |
3 |
| ||
2 |
| ||
4 |
| ||
2 |
2 |
1 |
2 |
PM |
PN |
A.(-∞,-5]∪[5,+∞) | B.(-∞,-25]∪[25,+∞) |
C.[-25,25] | D.[-5,5] |
AB |
MA |
MD |
A.1 | B.2 | C.3 | D.4 |
a |
A+B |
2 |
A-B |
2 |
3
| ||
4 |
b |
5 |
4 |
A+B |
2 |
A-B |
2 |
3
| ||
4 |
a |
b |
c |
a |
AB |
AC |
3 |
AB |
AC |
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