已知函数
,则函数
的零点个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1739238b698d7501f162cfe163d151b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695888c064b19157b69dcc2b8aa352d6.png)
A.4 | B.5 | C.6 | D.7 |
23-24高三上·云南德宏·期末 查看更多[3]
更新时间:2024-01-27 11:46:50
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相似题推荐
单选题
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(0.4)
【推荐1】已知函数
,其中
表示不超过
的最大正整数,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602c6c52cae281dc7dad9bc7cc07d6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() ![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】已知函数
,若关于
的函数
有8个不同的零点,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a4bde9f86f9016356cd4d870cc94dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7028f2126fafc7c1173d8fe2947b9b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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名校
【推荐1】已知函数
, 若
有四个互不相等的实数根
,且
. 则
的取值
范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3762aeb8f7fe2a5a791b6b316a51ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7fd60d3e96cc41ba2bf81a76753d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2163ba3dacce14d740349b7791018bc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65013a9d2abaf5bc3615e5cb6063e737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19e9ed3a313da510329d8949da25a1d.png)
![](https://img.xkw.com/dksih/QBM/2019/1/11/2116533141061632/2119143882399744/STEM/a2875cb1fe1e45d382b1d1297c77eaaa.png?resizew=4)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
,若
是偶函数,且满足函数
有一个零点,则a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75ca11d04ec13b95744d9d3c324076f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc7602223ad301131fa10f688f94823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐1】已知函数
是定义在
上的可导函数,对于任意的实数
,都有
,当
时,
,若
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70d95cf620043148bacc404f1a3ad94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e7a394c0580fa90e64695a1b270587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef23d6568634370dddfc2dd300dac46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知函数
,若
和
图象有三条公切线,则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f4ed90b043e4bcf7ed195d483b02f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐3】若
,
,
, 则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5a03f9a7b9d5e7856f471631b326be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12a566ab48f24fa7f236dab8ff11a36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb3af09983d0153749b4ce7225cb729.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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较难
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解题方法
【推荐1】已知当
时,
表示不超过
的最大整数,称
为取整函数,例如
,
,若
,且偶函数
,则方程
的所有解之和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7179c645736d68c90023f83d7f11ed01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fe1e778c9e668594c42b77459328c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a5894fc0f03d484ed2a2728ac40c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1550a97c21c1d71c9e95dde569668be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac6b2e021f3d015011c6283fefc50d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f4211cc4a8d8f8bc3706fe4842e21b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐2】关于函数
有下述四个结论:
①
的图象关于直线
对称 ②
在区间
单调递减
③
的极大值为0 ④
有3个零点
其中所有正确结论的编号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caebe9c9467f556e20ac9979932ca70b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879234adbae93aa72b7e101b3738d4e0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
其中所有正确结论的编号为( )
A.①③ | B.①④ | C.②③④ | D.①③④ |
您最近一年使用:0次