题目内容
| lim |
| x→2 |
| x-2 |
| x2-6x+8 |
| A．0 | B．1 | C．-
| D．
|
| lim |
| x→2 |
| x-2 |
| x2-6x+8 |
| lim |
| x→2 |
| x-2 |
| (x-2)(x-4) |
| lim |
| x→2 |
| 1 |
| x-4 |
| 1 |
| 2 |
故选C．
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相关题目
已知
=-
，则a值为（ ）
| lim |
| x→1 |
| x2-2x-5 |
| ax2 |
| 6 |
| 5 |
A、-
| ||
B、-
| ||
| C、-5 | ||
| D、5 |
故选C．
题目内容
| lim |
| x→2 |
| x-2 |
| x2-6x+8 |
| A．0 | B．1 | C．-
| D．
|
| lim |
| x→2 |
| x-2 |
| x2-6x+8 |
| lim |
| x→2 |
| x-2 |
| (x-2)(x-4) |
| lim |
| x→2 |
| 1 |
| x-4 |
| 1 |
| 2 |
| lim |
| x→1 |
| x2-2x-5 |
| ax2 |
| 6 |
| 5 |
A、-
| ||
B、-
| ||
| C、-5 | ||
| D、5 |