1 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a503bd44848c1f1af87516fcef73a4.png)
(1)求证
是关于
的方程
有解的一个充分条件;
(2)当
时,求关于
的方程
有一个正根和一个负根的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a503bd44848c1f1af87516fcef73a4.png)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6085a36ddc38b3be7e6fa0e2c5ae596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7add49a49ed66fa00cbb2f73622a6a39.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae018fde08edf0539089f98c17e11ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7add49a49ed66fa00cbb2f73622a6a39.png)
您最近一年使用:0次
2023-02-14更新
|
288次组卷
|
4卷引用:四川省资阳市2022-2023学年高二下学期入学检测(上学期期末质量监测)理科数学试题
四川省资阳市2022-2023学年高二下学期入学检测(上学期期末质量监测)理科数学试题四川省资阳市2022-2023学年高二上学期期末文科数学试题四川省资阳市2022-2023学年高二上学期期末理科数学试题(已下线)第03讲 2.3二次函数与一元二次方程、不等式(1)-【帮课堂】
名校
2 . 设
,若
,求证:
(1)方程
有实根.
(2)若﹣2<
<﹣1且设x1,x2是方程f(x)=0的两个实根,则
≤|x1﹣x2|<
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed5e24a361246136f5983db6fffa23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89f3aa94bdf6023318d8fb489bc2470.png)
(1)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7add49a49ed66fa00cbb2f73622a6a39.png)
(2)若﹣2<
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
您最近一年使用:0次
2017-11-03更新
|
535次组卷
|
2卷引用:广东省韶关市高中数学2016-2017学年高二上学期期中理数试题
名校
解题方法
3 . 已知函数
,且对
,
,都有
.
(1)求
的表达式;
(2)已知关于x的不等式
的解集为A,若
,求实数a的取值范围;
(3)已知数列
中,
,
,记
,且数列
的前n项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282e825c14110833c45ac9db52e5f42c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6593a700bf3e89107556454666b787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845ebe200c96e5259501ad8978ffae5f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6b1cfb0b2755e419ed28cbb4d0ece4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6397b02d758108ce97907d2efcac1d63.png)
(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2bc260323ce13981f2ee3fdfb52d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08ed7d51b6175cae1cbc40e8878e3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29877f249cacfa421cc082410a73e69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d35a29be4e48c56ee056c4b9cad8110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5737f1f9cad2471f3ca53241b25a1eb9.png)
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