题目
题型:单选题难度:一般来源:不详
a |
|b| |
a |
|b| |
A.2 | B.3 | C.4 | D.5 |
答案
故有
a |
|b| |
1 |
2 |
当a>0时,
a |
|b| |
1 |
2 |
a |
|b| |
a |
|b| |
当a<0时,
a |
|b| |
1 |
2 |
a |
|b| |
a |
|b| |
故选B.
核心考点
举一反三
1 |
(a-1)(b+1) |
1 |
(a-2)(b+2) |
1 |
(a-2000)(b+2000) |
a |
|a| |
b |
|b| |
c |
|c| |
a |
|b| |
a |
|b| |
A.2 | B.3 | C.4 | D.5 |
a |
|b| |
1 |
2 |
a |
|b| |
1 |
2 |
a |
|b| |
a |
|b| |
a |
|b| |
1 |
2 |
a |
|b| |
a |
|b| |
1 |
(a-1)(b+1) |
1 |
(a-2)(b+2) |
1 |
(a-2000)(b+2000) |
a |
|a| |
b |
|b| |
c |
|c| |