ax+b |
1+x2 |
1 |
2 |
2 |
5 |
1 |
2 |
2 |
5 |
| ||
1+
|
2 |
5 |
x |
1+x2 |
x1 |
1+x12 |
x2 |
1+x22 |
(x1-x2)(1-x1x2) |
(1+x12)(1+x22) |
1 |
2 |
1 |
2 |
f(x1)-f(x2) |
x1-x2 |
A.f(3)<f(-2)<f(1) | B.f(1)<f(-2)<f(3) | C.f(-2)<f(1)<f(3) | D.f(3)<f(1)<f(-2) |
A.2 | B.
| C.4 | D.
|
A.y=|x| | B.y=3-x | C.y=
| D.y=-x2+4 |
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