已知函数
,
,且
,则关于
的方程
实根个数的判断正确的是_________ .
①当
时,方程
没有相异实根
②当
或
时,方程
有1个相异实根
③当
时,方程
有2个相异实根
④当
或
或
时,方程
有4个相异实根
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51d3a594ceabe4c460f2f57db63f25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105e840aa5aff73c0d3a69b6af576a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44dd9c3304c12211c3552028eb7778d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2b3a549334f3dfa2549da0f6e96006.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d8751a63b5140cdcce57d6dec6c774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2b3a549334f3dfa2549da0f6e96006.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ed28bd3e4f79cf62f0820215992dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11dec747672851158042b302071f3f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2b3a549334f3dfa2549da0f6e96006.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1702e6ac8b63385da2d3239d9d2d1258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2b3a549334f3dfa2549da0f6e96006.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6080581d8e0d4e7b5f271183ee7a14e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546235cb9db05ff857ac5f86f1511f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0fd15b88e7888d5143a4c189b83e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2b3a549334f3dfa2549da0f6e96006.png)
20-21高一下·黑龙江哈尔滨·期末 查看更多[3]
黑龙江省哈尔滨市第三中学校2020-2021学年高一下学期期末数学试题(已下线)第1章《常用逻辑用语》章节复习巩固提高练-2021-2022学年高二数学同步训练精选新题汇编(人教A版选修2-1)河北省唐山市第一中学2021届高三上学期期中数学试题
更新时间:2020-11-29 12:09:27
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