x-a |
x2+bx+1 |
x-a |
x2+bx+1 |
x |
x2+bx+1 |
x |
x2+bx+1 |
-x |
x2-bx+1 |
x |
x2+1 |
x1 |
x12+1 |
x2 |
x22+1 |
x1•(x22+1)-x2•(x12+1) |
(x12+1)•(x22+1) |
(x1-x2) •(1-x1•x2 ) |
(x12+1)•(x22+1) |
x |
x2+1 |
x |
x2+1 |
1 |
2 |
1 |
3 |
A.(-∞,
| B.[
| C.(
| D.[
|
1 |
ax-1 |
1 |
2 |
A.ex≤1+x2 | B.cosx≥1-
| ||
C.x≤tanx | D.ln(x+1)≥x-
|
A.9 | B.-7 | C.-5 | D.-11 |
© 2017-2019 超级试练试题库,All Rights Reserved.