名校
1 . 已知函数
,取点
,过
作曲线
的切线交y轴于
,取点
,过
作曲线
的切线交y轴于
......依此类推,直到当
时停止操作,此时得到数列
.给出下列四个结论:①
;②当
时,
;③当
时,
恒成立;④若存在k∈N*,使得
,
,…,
成等差数列,则k的取值只能为3.其中,所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722bf15521a0167d2946e7a3c5ba293c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5614dfcc099de673b208bb69c340bfdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994a73686deb355bd5dc11276e481fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15b10c362800032976abea026b0d433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808055c60d55f08405cf5182ca403c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58bf1a283bc365a5bda7cd91e76766bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e5ced14046ffd5c9e4e8b3405f5f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab2b74474c95838de5ca565e7708832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e5ced14046ffd5c9e4e8b3405f5f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d143a396bb10a9f72d9fe1adc6d8f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
您最近一年使用:0次
解题方法
2 . 已知正三棱锥
的六条棱长均为
是底面
的中心,用一个平行于底面的平面截三棱锥,分别交
于
点(不与顶点
,
重合).
给出下列四个结论:
①三棱锥
为正三棱锥;
②三棱锥
的高为
;
③三棱锥
的体积既有最大值,又有最小值;
④当
时,
.
其中所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7693e14c734984e97a96ef28c2130d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bb1063e139610045f3bca5ca0b2766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2c4f20594ab1443c0d8dcce42895f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
给出下列四个结论:
①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34ff9450ce57ce695b3d0aee478636f.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f8873277888e5c66b34ce31841d1fda.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34ff9450ce57ce695b3d0aee478636f.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7354bcf107b32961ada3dc5f047e8abe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee600a828e7444464fbd791f59c57047.png)
其中所有正确结论的序号是
您最近一年使用:0次
解题方法
3 . 在下列函数①
;②
;③
;④
中,满足在定义域内
恒成立的函数个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04beea76c59a6c5b096d8c5a3b77f8a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7f9b35017daa8b524c5717a355834a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8a7415f59399b4b1a46489252af39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355077ec40bb6fe668ac85944445878a.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2021-08-04更新
|
565次组卷
|
2卷引用:北京市大兴区2020-2021学年高二下学期期末数学试题