4 |
x |
4 |
x |
4 |
-x |
4 |
x |
4 |
x1 |
4 |
x2 |
x2-x1 |
x1x2 |
4 |
x1x2 |
4 |
x1x2 |
4 |
x1x2 |
4 |
x1x2 |
4 |
x1 |
4 |
x2 |
x2-x1 |
x1x2 |
4 |
x1x2 |
4 |
x1x2 |
4 |
x1x2 |
4 |
x1x2 |
A.f(
| B.f(
| ||||||||
C.f(
| D.f(-5)<f(
|
A.(-2,0)∪(0,2) | B.(-∞,-2)∪(0,2) | C.(-∞,-2)∪(2,+∞) | D.(-2,0)∪(2,+∞) |
a |
a2-1 |
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