x |
a |
b |
x |
4c2 |
k(k+c) |
2 |
x |
4 |
x2 |
2 |
x |
2 |
x |
2 |
2 |
2 |
2 |
x |
a |
b |
x |
x |
a |
b |
x |
x |
a |
b |
x |
2b |
a |
x |
a |
b |
x |
|
2b |
a |
|
b |
a |
|
1 |
2 |
a+b |
2 |
x |
a |
b |
x |
1 |
2 |
x |
a |
b |
x |
|
b |
a |
c |
k |
b |
a |
c |
k+c |
c |
k |
c |
k+c |
4c2 |
k(k+c) |
|
A.(1,+∞) | B.(-∞,3) | C.[
| D.(1,3) |
1 |
2 |
|
A.1 | B.2 | C.3 | D.4 |
a |
b |
a |
b |
a |
b |
m |
a |
b |
n |
a |
b |
m |
n |
m |
n |
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