题目
题型：不详难度：来源：
| 1 |
| a |
| a |
| x-5 |
| 2a-1 |
| 3 |
| 1 |
| 5 |
| A．1 | B．2 | C．3 | D．4 |
答案
| 1 |
| a |
| a |
| x-5 |
核心考点
举一反三
| x2-1 |
| x-1 |
| 1 |
| x |
| A．0 | B．2 | C．-2 | D．±2 |
| x-1 |
| x+1 |
| A．x≥-1 | B．x≤-1 | C．x＞-1 | D．x≠-1 |
| (x+1)(x-2) |
| (x-2)(x-1) |
| A．x≠2 | B．x≠1 | C．x≠1且x≠2 | D．x≠1或x≠2 |
| 1 |
| a |
| a |
| x-5 |
| 2a-1 |
| 3 |
| 1 |
| 5 |
| A．1 | B．2 | C．3 | D．4 |
| 1 |
| a |
| a |
| x-5 |
| x2-1 |
| x-1 |
| 1 |
| x |
| A．0 | B．2 | C．-2 | D．±2 |
| x-1 |
| x+1 |
| A．x≥-1 | B．x≤-1 | C．x＞-1 | D．x≠-1 |
| (x+1)(x-2) |
| (x-2)(x-1) |
| A．x≠2 | B．x≠1 | C．x≠1且x≠2 | D．x≠1或x≠2 |