中学生网络课堂本课配套习题挑战模式1/3
单选题
难度系数：
1.
已知函数f(x)的图象是连续不断的曲线，有如下的x与f(x)的对应值表
| x | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
 | 132.1 | 15.4 | －2.31 | 8.72 | －6.31 | －125.1 | 12.6 |
那么，函数在区间[1,7]上的零点至少有( )
| A: 5 |
| B: 4 |
| C: 3 |
| D: 2 |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 提示2：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
- 答案：Qg==
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
本课配套习题挑战模式2/3
单选题
难度系数：
2.
函数
在区间
内零点的个数是（ ）
| A: 0 |
| B: 1 |
| C: 2 |
| D: 3 |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：Qg==
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
本课配套习题挑战模式3/3
单选题
难度系数：
3.
函数
的零点所在区间是（ ）
| A:
|
| B:
|
| C:
|
| D:
|
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Yip55So6Zu254K55a2Y5Zyo5oCn5a6a55CG5Yik5pat6Zu254K55omA5Zyo5Yy66Ze0PGJyPjwvcD4=
- 提示2：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
- 答案：Qg==
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
