9 |
5 |
x2 |
25 |
y2 |
9 |
A.充要条件 | B.必要不充分条件 |
C.充分不必要条件 | D.既非充分也非必要 |
a2 |
c |
25 |
4 |
25 |
4 |
9 |
4 |
25 |
4 |
x2 |
a2 |
y2 |
b2 |
A.
| B.
| C.
| D.
|
x2 |
25 |
y2 |
16 |
F2M |
MP |
x2 |
a2 |
y2 |
b2 |
| ||
2 |
A.{x|-
| B.{x|-2≤x<-
| ||||||||||||
C.{x|-2≤x<-
| D.{x|-
|
x2 |
m |
y2 |
24 |
5 |
13 |
A.48 | B.16 |
C.32 | D.与m有关的值 |
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