1-kx |
x-1 |
1+kx |
-x-1 |
x-1 |
1-kx |
1-x |
x-1 |
x+1 |
x-1 |
x+1 |
x-1 |
(x1+1)(x2-1) |
(x1-1)(x2+1) |
x1x2-x1+x2-1 |
x1x2-x2+x1-1 |
x1x2-x1+x2-1 |
x1x2-x2+x1-1 |
5 |
2 |
7 |
2 |
A.f(
| B.f(1)<f(
| C.f(
| D.f(
|
A.1 | B.-2 | C.0 | D.-1 |
1-2x |
2x+1+a |
A.a≥-3 | B.a≤-3 | C.a≤5 | D.a≥3 |
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