题干
准确计算：
+
=____
﹣
=____
+
=____
﹣
=____
﹣
=____
+
+
=____ 1112
﹣（
+
）=____
﹣（
﹣
）=____
﹣（
﹣
）=____
| 1 |
| 2 |
| 5 |
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 3 |
| 8 |
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 3 |
| 9 |
| 8 |
| 2 |
| 7 |
| 8 |
3
﹣
﹣
=____
| 5 |
| 6 |
| 3 |
| 4 |
| 1 |
| 4 |
| 7 |
| 1 |
| 8 |
11﹣
﹣
=____
| 1 |
| 3 |
| 7 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 8 |
答案(点此获取答案解析）
,
，若函数
有3个零点，则实数
的