名校
解题方法
1 . 已知函数
,如果存在常数
,对任意满足
的实数
,其中
,都有不等式
恒成立,则称函数
是“绝对差有界函数”
(1)函数
是“绝对差有界函数”,求常数
的取值范围;
(2)对于函数
,存在常数
,对任意的
,有
恒成立,求证:函数
为“绝对差有界函数”
(3)判断函数
是不是“绝对差有界函数”?说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c413f613d1bb2dfbfc9969f82416196a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876a24bd55b56b1b1222895018eeb33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dec717182be7265a9a11f65068da359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a1e7412ce026da3be8b80117426f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee3021f33d4044c903de28d926911a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c413f613d1bb2dfbfc9969f82416196a.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329731df2bbd762126f4e7df01cb188c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)对于函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062f2074ff3e5e5e72e20f4d066f0e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f20b947d584a1dc48676c2ae6e2af52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ecdccf4a334ea959a456533c40d53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062f2074ff3e5e5e72e20f4d066f0e9d.png)
(3)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c266b102e4db9bcbb5a1e4ca16c9253a.png)
您最近一年使用:0次
名校
解题方法
2 . 设函数
的定义域为D,对于区间
,当且仅当函数
满足以下①②两个性质中的任意一个时,则称区间
是
的一个“美好区间”.
性质①:对于任意
,都有
;性质②:对于任意
,都有
.
(1)已知
,
.分别判断区间
和区间
是否为函数
的“美好区间”,并说明理由;
(2)已知
且
,若区间
是函数
的一个“美好区间”,求实数
的取值范围;
(3)已知函数
的定义域为
,其图像是一条连续不断的曲线,且对于任意
,都有
.求证:函数
存在“美好区间”,且存在
,使得
不属于函数
的任意一个“美好区间”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b7f3c56708bc693a0ce74643be38cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
性质①:对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b359345c5afa1739bf5ebf8982e1d959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198025cc2e6afede12c13375b71e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b359345c5afa1739bf5ebf8982e1d959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab98f168e7e388981a83c792bef034de.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4078f129da5a6cb569345de01c4d019c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c2cc4cd1e8bcb4b75b6e799156736e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9099a75c433e97bbe05052a00110571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bed897a25d7f5d6d4693e3076023745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257b5cac000fa7c846215d986d6aa90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a173c108f4d3a4e8b641724d966d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070054c0b4182ab7399ed56925844e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3897bf276a0b6c2121917d39b369df7.png)
您最近一年使用:0次
7日内更新
|
151次组卷
|
3卷引用:上海市 位育中学2023-2024学年高三下学期三模数学试题
3 . 如图,已知双曲线
的离心率为2,点
在C上,A,B为双曲线的左、右顶点,
为右支上的动点,直线AP和直线x=1交于点N,直线NB交C的右支于点Q.
(2)探究直线PQ是否过定点,若过定点,求出该定点坐标,请说明理由;
(3)设S1,S2分别为△ABN和△NPQ的外接圆面积,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765cbff0d67de6de7129c4b693f7652b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)探究直线PQ是否过定点,若过定点,求出该定点坐标,请说明理由;
(3)设S1,S2分别为△ABN和△NPQ的外接圆面积,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142b9d242ef0c6b807d1257f2638b37b.png)
您最近一年使用:0次
解题方法
4 . 如果n项有穷数列
满足
,
,…,
,即
,则称有穷数列
为“对称数列”.
(1)设数列
是项数为7的“对称数列”,其中
成等差数列,且
,依次写出数列
的每一项;
(2)设数列
是项数为
(
且
)的“对称数列”,且满足
,记
为数列
的前
项和.
①若
,
,…,
构成单调递增数列,且
.当
为何值时,
取得最大值?
②若
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd94aeeecf0123921d4aef51c5defcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341bd4ff68347b38c8e3f9e5a3b665dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692f0652866d5e18fa597d40bfc3cac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7104e10aa92b7fd3eb4e497263186664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a447e5baee4f7518706498d4aca7553b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a03258158539436dd0e35c7e50e771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897d8f6cf00391f1b3ff70432f0121b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b08c58baacec3cd0c0a06e267fa9ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22e9369b6a9bb29239a519c10ec392c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e5dfcc28321b563a8012ec2899c502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0e83ab6e88006fcca1d1b92e474d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a31ec8dee46f3affe69cbdb2abbe8feb.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebea127cabddcc7adf4fe527b2472e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f5369a97c0c1c45293ac014bd060d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解题方法
5 . 已知双曲线
:
的渐近线方程为
,过点
的直线
交双曲线
于
,
两点,且当
轴时,
.
(1)求
的方程;
(2)记双曲线
的左右顶点分别为
,
,直线
,
的斜率分别为
,
,求
的值.
(3)探究圆
:
上是否存在点
,使得过
作双曲线的两条切线
,
互相垂直.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63f162c4846a76cadee56ae2f42e37c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165a501b2e6a3acc46212e59a166c053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4afe0675f2c733af5c05ca00811c5ce.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)记双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b06b75fb4e379ff3b99e68f40136cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
(3)探究圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3317adf44367d81e2fbde5b9985185b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
您最近一年使用:0次
名校
解题方法
6 . 已知函数
.
(1)求函数
在
处的切线方程.
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc037f008a8b878b1245e9e296031f0f.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34710f572d5db6f5ba109066204ae97c.png)
您最近一年使用:0次
解题方法
7 . 已知O为坐标原点,椭圆
左、右焦点分别为
,短轴长为
,过
的直线
与椭圆
交于
两点,
的周长为8.
(1)求
的方程;
(2)若直线l与Ω交于A,B两点,且
,求|AB|的最小值;
(3)已知点P是椭圆Ω上的动点,是否存在定圆O:x2+y2=r2(r>0),使得当过点P能作圆O的两条切线PM,PN时(其中M,N分别是两切线与C的另一交点),总满足|PM|=|PN|?若存在,求出圆O的半径r:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51be38237df3982ee2615a2e20830e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c084b48b27ce17a659fb3e9b79d684.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
(2)若直线l与Ω交于A,B两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc11e7549cfce9220e70250ac943e457.png)
(3)已知点P是椭圆Ω上的动点,是否存在定圆O:x2+y2=r2(r>0),使得当过点P能作圆O的两条切线PM,PN时(其中M,N分别是两切线与C的另一交点),总满足|PM|=|PN|?若存在,求出圆O的半径r:若不存在,请说明理由.
您最近一年使用:0次
名校
解题方法
8 . ①在高等数学中,关于极限的计算,常会用到:i)四则运算法则:如果
,
,则
,
,若B≠0,则
;ii)洛必达法则:若函数
,
的导函数分别为
,
,
,
,则
;
②设
,k是大于1的正整数,若函数
满足:对
,均有
成立,则称函数
为区间(0,a)上的k阶无穷递降函数.结合以上两个信息,回答下列问题;
(1)计算:①
;
②
;
(2)试判断
是否为区间
上的2阶无穷递降函数;并证明:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac55b621b2f27bc851f91362ef8fed13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7ae65af1a33cd09757bd180e607a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b0ca1f81ee531ffe24a41e094bf1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4961ef8dba3a1376346c179290bfa545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ff3cd9870608b67f0bc1d941162ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090a91e4f3c8930674f98a9fa527709b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783c88951a458d5862557f2a041f817a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fd51a4ede3d8a6433cf0c114013956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16c5321133b0e626b32b5fa4b46181d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3900fe0b85ab5c057c4e3c2ceb0cb062.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a69e2c9a58ba833bd9912f3c14cdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67439f6be88350018cfba3f2aca73f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(1)计算:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7529d1357e6d9e2343b2bb7fcb9aaf55.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e7be4d2e62ef20bcee0c65a3535879.png)
(2)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff62e468bc81227b9586e769acbc5ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbd5fbcb0ed2ac6d94982bc35a4f6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415e604884cb0c50cfcb95df9e9956e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2484f4dc493a45dae01bb8d385ee14e5.png)
您最近一年使用:0次
7日内更新
|
107次组卷
|
4卷引用:专题14 洛必达法则的应用【练】
解题方法
9 . 已知抛物线
上一点Q到焦点F的距离为2,点Q到y轴的距离为
.
(1)求抛物线C的方程;
(2)过F的直线交抛物线C于A,B两点,过点B作x轴的垂线交直线AO(O是坐标原点)于D,过A作直线DF的垂线与抛物线C的另一交点为E,直线
与
交于点G.求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70792da1e2be7212a3f76b8d1c999bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8794dad05cff3e19d6ba8f1658aa8422.png)
(1)求抛物线C的方程;
(2)过F的直线交抛物线C于A,B两点,过点B作x轴的垂线交直线AO(O是坐标原点)于D,过A作直线DF的垂线与抛物线C的另一交点为E,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ab7ed9b0df4db720f6f6c3e32f7c1d.png)
您最近一年使用:0次
7日内更新
|
64次组卷
|
2卷引用:2024届四川省攀枝花市高考数学三模(理科)试卷
名校
解题方法
10 . 已知函数
.
(1)求函数
的最值;
(2)若
,设曲线
与
轴正半轴的交点为
,该曲线在点
处的切线方程为
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd14ea273c21800c00132219688c61c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c28eea59d06bd471fb15d2111014817.png)
您最近一年使用:0次