12-13高三下·重庆·阶段练习
1 . 给出以下命题:
① 双曲线
的渐近线方程为
;
② 命题
“
,
”是真命题;
③ 已知线性回归方程为
,当变量
增加
个单位,其预报值平均增加
个单位;
④ 设随机变量
服从正态分布
,若
,则
;
⑤ 已知
,
,
,
,依照以上各式的规律,得到一般性的等式为
,(
)
则正确命题的序号为________________ (写出所有正确命题的序号).
① 双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acca1c00ee33a8d7aabf1d626541259e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95b60de1f6993edd7275bcf8b9527dd.png)
② 命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7eb222c30d40a968d6667b2d449bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a264a1aa04dde67e2e78100945e09e1.png)
③ 已知线性回归方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8a20de7a89ee822d3e55db1205cef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
④ 设随机变量
![](https://img.xkw.com/dksih/QBM/2013/5/5/1571206609248256/1571206614810624/STEM/9ac78b8cd0d64613961dc9e7d9b3c3a8.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcadfe766e5ce650c693bb394fb7473d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/263ce586145227444e4ec3e4a90fa6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6a96069c523416157f629f3c364cea.png)
⑤ 已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41dfdce938211349a4a8ca38eea07d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00664e3d1e38b11620ec99cb53e12100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aad616036618921c5721d2c3ef74bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab13d30a44b3224235914ed84f3453b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19fc7c5ab1e956d3c9a5aae548e2fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acedd683a7c98c2952785e4ac1df4785.png)
则正确命题的序号为
您最近一年使用:0次
2011·河北唐山·一模
解题方法
2 . 给出以下命题:
①双曲线
的渐近线方程为
;
②命题“
”是真命题;
③已知线性回归方程为
,当变量
增加2个单位,其预报值平均增加4个单位;
④设随机变量
服从正态分布
,若
,则
;
⑤设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2279df7e4731bd6490aebf13d9856dc6.png)
则正确命题的序号为________(写出所有正确命题的序号).
①双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acca1c00ee33a8d7aabf1d626541259e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95b60de1f6993edd7275bcf8b9527dd.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f542f7ffedb36713a74875fbd913ef8.png)
③已知线性回归方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8a20de7a89ee822d3e55db1205cef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
④设随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37bbde2076bfa6dd859f7787e155ab8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5e4c04e11c99553d865c87765c3380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5f03eb7d0c7fafb8750602173748ad.png)
⑤设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab68d62663af2e888754d86085ad27a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2279df7e4731bd6490aebf13d9856dc6.png)
则正确命题的序号为________(写出所有正确命题的序号).
您最近一年使用:0次
3 . 函数
图像上不同两点
,
处的切线的斜率分别是
,
,
为
两点间距离,定义
为曲线
在点
与点
之间的“曲率”,给出以下命题:
①存在这样的函数,该函数图像上任意两点之间的“曲率”为常数;
②函数
图像上两点
与
的横坐标分别为1,2,则 “曲率”
;
③函数
图像上任意两点
之间的“曲率”
;
④设
,
是曲线
上不同两点,且
,若
恒成立,则实数
的取值范围是
.其中正确命题的序号为_____________ (填上所有正确命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ff82ebdfad5e7de1c7487b0b817a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a53e311ee0b5085e7e5a45c606daa5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8605ae9897d5d6f0679b4aa80e014bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b3e87e9bb00d9ba09cb5660aebd76f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2847109c229d904f22819e564cdf151d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①存在这样的函数,该函数图像上任意两点之间的“曲率”为常数;
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bbfed9f9a393d712d79cf51c942999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316db967a70305dcd846281b29f421db.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2d520289f2ec0ac94d6e15a3c92b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a89a55c786b314c1de184fcf719eb69.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ff82ebdfad5e7de1c7487b0b817a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a53e311ee0b5085e7e5a45c606daa5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aeab36f3c3546b641470aad464ebd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d54d4444cd3d44a4e72c68a6013a21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a1f815b0e0b6516b684a93e1850667.png)
您最近一年使用:0次
2013·湖南怀化·一模
4 . 下列命题:
①当
时,
;
②
是
成立的充分不必要条件;
③对于任意
的内角
、
、
满足:
;
④定义:如果对任意一个三角形,只要它的三边长
、
、
都在函数
的定义域内,就有
、
、
也是某个三角形的三边长,则称
为“三角形型函数”.函数
是“三角形型函数”.
其中正确命题的序号为______ .(填上所有正确命题的序号)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fad1dd76d5b72f10f5bb62693a2996f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2522f1f61064198ab593a1fe5fef02eb.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa97e3205885691ab8eb03cb4db68219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
③对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4261f875c14f79fdd507932f8b74b51a.png)
④定义:如果对任意一个三角形,只要它的三边长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3bf2007903adc64d089a054c2284a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4889b4b46d3cd6dd677d200bdf4914fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de447d5e47448d0f15a7535bf3ce0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31f3f7dcf93f91d9a7d013cad75f1dd4.png)
其中正确命题的序号为
您最近一年使用:0次
2011·广西桂林·一模
名校
5 . 给出下列四个命题:
①过平面外一点,作与该平面成
角的直线一定有无穷多条;
②一条直线与两个相交平面都平行,则它必与这两个平面的交线平行;
③对确定的两条异面直线,过空间任意一点有且只有唯一的一个平面与这两条异面直线都平行;
④对两条异面的直线,都存在无穷多个平面分别与这两条直线所成的角相等;
其中正确的命题序号为______ (请把所有正确命题的序号都填上).
①过平面外一点,作与该平面成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
②一条直线与两个相交平面都平行,则它必与这两个平面的交线平行;
③对确定的两条异面直线,过空间任意一点有且只有唯一的一个平面与这两条异面直线都平行;
④对两条异面的直线,都存在无穷多个平面分别与这两条直线所成的角相等;
其中正确的命题序号为
您最近一年使用:0次
13-14高二下·湖北咸宁·期末
名校
6 . 称离心率为
的双曲线
为黄金双曲线.如图是双曲线
的图象,给出以下几个说法:
①双曲线
是黄金双曲线;
②若
,则该双曲线是黄金双曲线;
③若F1,F2为左右焦点,A1,A2为左右顶点,B1(0,b),B2(0,-b)且∠F1B1A2=90°,则该双曲线是黄金双曲线;
④若MN经过右焦点F2且MN⊥F1F2,∠MON=90°,则该双曲线是黄金双曲线.
其中正确命题的序号为____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c12a1eafce50c18c9bdcc5f05d799d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3099e5f0c209794e431b508bbd7b07e1.png)
①双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd89ca47d9aa6ac3a8392e9d1480db8a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988b7e964e313579ab8869d67d5be007.png)
③若F1,F2为左右焦点,A1,A2为左右顶点,B1(0,b),B2(0,-b)且∠F1B1A2=90°,则该双曲线是黄金双曲线;
④若MN经过右焦点F2且MN⊥F1F2,∠MON=90°,则该双曲线是黄金双曲线.
其中正确命题的序号为
![](https://img.xkw.com/dksih/QBM/2014/9/19/1571859120709632/1571859126272000/STEM/9158e64a977d4a15a3dfded93e81c741.png?resizew=227)
您最近一年使用:0次
2016-12-03更新
|
3191次组卷
|
9卷引用:2015届安徽省淮北市高三第一次模拟考试理科数学试卷
7 . 如图,两个椭圆
、
内部重叠区域的边界记为曲线
是曲线
上的任意一点,给出下列四个判断:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/b7f07cff-39b1-4e64-875d-9e43821bfa3d.png?resizew=157)
①
到
、
、
、
四点的距离之和为定值;
②曲线
关于直线
均对称;
③曲线
所围区域面积必小于36.
④曲线
总长度不大于6π.上述判断中正确命题的序号为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b747db7eaf469c6d1607e4b0d028299f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781bf1ba5437d9095fe95474f1260376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e11127fbf96867f29f22cda3e775a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/b7f07cff-39b1-4e64-875d-9e43821bfa3d.png?resizew=157)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9659fe1279984da6a8d4d2bc369142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682f50684ae25e45dfec0eaf8112a7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5afc8f55e1265355310db729d5b8026c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4efb6f8e0a4b33da45f2cc157c7ec015.png)
②曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2816c1cb72ed019c7a062bd59aab4af9.png)
③曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
④曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2017-10-02更新
|
893次组卷
|
5卷引用:陕西省2023届高三下学期教学质量检测(二)理科数学试题
陕西省2023届高三下学期教学质量检测(二)理科数学试题陕西省2023届高三下学期教学质量检测(二)文科数学试题河南省中原名校2018届高三上学期第一次质量考评+数学(文)(已下线)专题14解析几何(选填)(已下线)专题14解析几何(选填)
8 . 考查等式:
(*),其中
,
且
.某同学用概率论方法证明等式(*)如下:设一批产品共有
件,其中
件是次品,其余为正品.现从中随机取出
件产品,记事件
{取到的
件产品中恰有
件次品},则
,
,1,2,…,
.显然
,
,…,
为互斥事件,且
(必然事件),因此
,所以
,即等式(*)成立.对此,有的同学认为上述证明是正确的,体现了偶然性与必然性的统一;但有的同学对上述证明方法的科学性与严谨性提出质疑.现有以下四个判断:①等式(*)成立,②等式(*)不成立,③证明正确,④证明不正确,试写出所有正确判断的序号___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb037e045b5418574fe43786d011b870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a0d69abd7440e8c12a1cc1473a97a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0158fa1faefc97c5f71d29afec59d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845198f8baea2e38597b647c25c9f80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b89f303306dc40a27c37c63b2564c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a724f29764aa9f60eae054bc085cd3c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd55ae46a41a37f90a3d745b9e8f879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de035ed078636b813bf458049b0c9f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18986bb85782ebb42ce85629b4ea8d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb037e045b5418574fe43786d011b870.png)
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名校
9 . 小图给出了某池塘中的浮萍蔓延的面积
与时间
(月)的关系的散点图.有以下叙述:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/029f96d1-7a94-4aa9-aad5-4b1f8f157fa5.png?resizew=153)
①与函数
相比,函数
作为近似刻画
与
的函数关系的模型更好;
②按图中数据显现出的趋势,第
个月时,浮萍的面积就会超过
;
③按图中数据显现出的趋势,浮萍每个月增加的面积约是上个月增加面积的两倍;
④按图中数据显现出的趋势,浮萍从
月的
蔓延到
至少需要经过
个月.
其中正确 的说法有__________ (填序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4010da5b1fd07138d34cd7c2bd75bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/029f96d1-7a94-4aa9-aad5-4b1f8f157fa5.png?resizew=153)
①与函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bebf5990eedb3ea8007cbecbeed74a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fbddfe8f39a0f9bff98ba8c43e2f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②按图中数据显现出的趋势,第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0d2fc279da590a219b3cf21824bc22.png)
③按图中数据显现出的趋势,浮萍每个月增加的面积约是上个月增加面积的两倍;
④按图中数据显现出的趋势,浮萍从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303dd9dcc519133e7fde976018cc0b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf9507178ebeea5d8cb761d392ef81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
其中
您最近一年使用:0次
2018-08-13更新
|
427次组卷
|
4卷引用:北京市2023届高三数学模拟试题
北京市2023届高三数学模拟试题北京市顺义区第一中学2023届高三高考考前适应性检测数学试题北京市西城161中学2017-2018学年高一上期中考试数学试题(已下线)【走进新高考】(人教A版必修一)3.2.2 函数模型的应用实例(第2课时)同步练习01
2010·黑龙江哈尔滨·一模
解题方法
10 . 已知圆
与圆
,在下列说法中:
①对于任意的
,圆
与圆
始终相切;
②对于任意的
,圆
与圆
始终有四条公切线;
③当
时,圆
被直线
截得的弦长为
;
④
分别为圆
与圆
上的动点,则
的最大值为4.
其中正确命题的序号为______ .
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/931d726a0d4841ae9b1c03168c628d0a.png?resizew=220)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/5635d69a619847ba9aaf57794e9012c0.png?resizew=91)
①对于任意的
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/8369f20c30374e03a6b13f5d8f948a15.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/da9f02d104994c8485f6d4b5cd086f65.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/bdbc8b7398634450a3ff71a521b58b72.png?resizew=20)
②对于任意的
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/8369f20c30374e03a6b13f5d8f948a15.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/da9f02d104994c8485f6d4b5cd086f65.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/bdbc8b7398634450a3ff71a521b58b72.png?resizew=20)
③当
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/508345b0c6764b6d9d64ccd1991cf101.png?resizew=40)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/da9f02d104994c8485f6d4b5cd086f65.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/f15d3415524749a3ad5ff841d4133fd6.png?resizew=105)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/d6b1859244b4448a8674dc717d67ed9a.png?resizew=23)
④
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/02dccdc836cd4166996e9f20863e52e3.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/da9f02d104994c8485f6d4b5cd086f65.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/bdbc8b7398634450a3ff71a521b58b72.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601297408/STEM/67ece29fd5b54627952aefe0fdad7421.png?resizew=35)
其中正确命题的序号为
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