设A、B、C是函数
与函数
的图象连续相邻的三个交点,若
是锐角三角形,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4794be662f783b33ee48c6628e1d1628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9524dcbdc908ba21656b66c04c2193c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-24 14:35:48
|
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单选题
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名校
解题方法
【推荐1】质点
和
在以坐标原点
为圆心,半径为1的圆
上逆时针做匀速圆周运动,同时出发.
的角速度大小为
,起点为圆
与
轴正半轴的交点,
的角速度大小为
,起点为角
的终边与圆
的交点,则当
与
重合时,
的坐标不可以 为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0513d14384fa76fd284f63ff4d8f08bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd026aad29668faffc99cd5f3e0930b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f9ee07c64f43efb8144721f3ae222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
【推荐1】已知函数
,则关于
的方程
有以下结论:
①当
时,方程
恒有根;
②当
时,方程
在
内有两个不等实根;
③当
时,方程
在
内最多有9个不等实根;
④若方程
在
内的根的个数为偶数,则所有根之和为
.
其中正确结论的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3e7a356785eb0e16b9253d7529acea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8452eaec2e2c3112c0a1f89a6742c.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8452eaec2e2c3112c0a1f89a6742c.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4d0aca3657c6d99e820e2567f18683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8452eaec2e2c3112c0a1f89a6742c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24192cace1d2a643fc3a42a5b7ac273.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8452eaec2e2c3112c0a1f89a6742c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028f327307a1c307a8eaf03cb92cb391.png)
④若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8452eaec2e2c3112c0a1f89a6742c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028f327307a1c307a8eaf03cb92cb391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7da0bd11533e2a6096272e372f467d.png)
其中正确结论的个数为
A.1 | B.2 |
C.3 | D.4 |
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【推荐2】设定义在R上的函数f(x)是最小正周期为2π的偶函数,f'(x)是f(x)的导函数,当x∈[0,π]时,0≤f(x)≤1;当x∈(0,π)且x≠
时,
,则函数y=f(x)-|sinx|在区间
上的零点个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de12bbd5097debc83d6a46364589748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8604f36a7e7fd5c0a7b123494c5e089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2939d8ea48e5c71c086fec42d5cb2fc1.png)
A.4 | B.6 | C.7 | D.8 |
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【推荐3】若
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7bc790f663d48dba87d633d77ae95b.png)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.存在实数![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.若函数![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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