ax+b |
1+x2 |
1 |
2 |
2 |
5 |
ax+b |
1+x2 |
1 |
2 |
| ||
1+(
|
2 |
5 |
1 |
2 |
-
| ||
1+(-
|
1 |
2 |
2 |
5 |
x |
1+x2 |
x1 |
1+x12 |
x2 |
1+x22 |
x1(1+x22)-x2(1+x12) |
(1+x12)(1+x22) |
(x1-x2)(1-x1x2) |
(1+x12)(1+x22) |
|
1 |
2 |
1 |
2 |
A.f(x1)>f(x2) | B.f(x1)=f(x2) |
C.f(x1)<f(x2) | D.不能确定大小 |
1 |
2 |
1 |
2 |
A.(-∞,
| B.[-
| C.(-
| D.[
|
-x2-2x+3 |
|
x+a |
x2+bx+1 |
© 2017-2019 超级试练试题库,All Rights Reserved.