a |
a |
a |
a |
| ||
3 |
| ||
3 |
a |
a |
a |
3 |
6 |
a |
a |
a |
a |
| ||
3 |
| ||
3 |
a2 |
| ||
3 |
| ||
3 |
a3 |
1 |
2 |
| ||
2 |
a |
a |
a |
3 |
6 |
a |
a |
a |
a |
a |
a |
3 |
6 |
a |
| ||
3 |
| ||
3 |
a |
| ||
3 |
| ||
3 |
a |
a |
a |
3 |
6 |
a-1 |
a2-a+1 |
A.充分必要条件 | B.充分不必要条件 |
C.必要不充分条件 | D.既非充分也非必要条件 |
1 |
x-a |
A.充分必要条件 | B.充分不必要条件 |
C.必要不充分条件 | D.非充分必要条件 |
a |
b |
a |
b |
a |
b |
a |
b |
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.非充分非必要条件 |
a1 |
a2 |
b1 |
b2 |
c1 |
c2 |
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