1 . 已知数列
的各项均为正数,其前n项的积为
,记
,
.
(1)若数列
为等比数列,数列
为等差数列,求数列
的公比.
(2)若
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716c5a425d043483c598d4f7e401a16a.png)
①求数列
的通项公式.
②记
,那么数列
中是否存在两项
,(s,t均为正偶数,且
),使得数列
,
,
,成等差数列?若存在,求s,t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23469af3e5be16af7fb4a5d3edca2652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57165b3c8ffeee6e8372ea0daebee44b.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716c5a425d043483c598d4f7e401a16a.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
②记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe62e27d9f294191ef325ca302b79515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efafd4bd96fe69a11444e6662fd0c415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f09f29bb529ab9967a275b26e150c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d4ad9afdd266c6d38421bdfccd45e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31b6a20fe07023d2f1c386a7cb73d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b924cf3c2252a73ec6809ca262643f7.png)
您最近一年使用:0次
2020-05-14更新
|
965次组卷
|
5卷引用:专题20 数列的综合-2020年高考数学母题题源解密(江苏专版)
(已下线)专题20 数列的综合-2020年高考数学母题题源解密(江苏专版)2020届江苏省高三高考全真模拟(六)数学试题江苏省连云港市赣榆区智贤中学2020届高三下学期高考适应性考试数学试题(已下线)专题7 等比数列的性质 微点3 等比数列的性质综合训练(已下线)专题10 数列通项公式的求法 微点5 构造法
名校
2 . 已知函数
.
(Ⅰ)当
时,求
零点处的切线方程;
(Ⅱ)若
有两个零点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9f97f7a85bf705634839ec09963826.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dae74c724114bfeff024dd7b79f5edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4fd45000fe915a242d0e78a420068e3.png)
您最近一年使用:0次
2020-05-13更新
|
1591次组卷
|
5卷引用:2020届辽宁省大连市高三下学期第一次模拟考试数学(理)试题
2020届辽宁省大连市高三下学期第一次模拟考试数学(理)试题(已下线)专题1.13 导数-零点问题-2021年高考数学解答题挑战满分专项训练(新高考地区专用)(已下线)第29讲 割线法证明零点差大于某值,切线法证明零点差小于某值-突破2022年新高考数学导数压轴解答题精选精练(已下线)第三章 重点专攻二 不等式的证明问题(讲)四川省成都市武侯区第七中学2020-2021学年下学期高三数学(理)开学考试试题
3 . 两个数列
、
,当
和
同时在
时取得相同的最大值,我们称
与
具有性质
,其中
.
(1)设
的二项展开式中
的系数为
(
),
,记
,
,
,依次下去,
,组成的数列是
;同样地,
的二项展开式中
的系数为
(
),
,记
,
,
,依次下去,
,组成的数列是
;判别
与
是否具有性质
,请说明理由;
(2)数列
的前
项和是
,数列
的前
项和是
,若
与
具有性质
,
,则这样的数列
一共有多少个?请说明理由;
(3)两个有限项数列
与
满足
,
,且
,是否存在实数
,使得
与
具有性质
,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7728d33987f271f5ec625592076593b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d032d57e0d95dddb3d4501249f1327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7728d33987f271f5ec625592076593b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d032d57e0d95dddb3d4501249f1327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ca4f2b82d9d7a8323c8d697338a6a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7728d33987f271f5ec625592076593b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d032d57e0d95dddb3d4501249f1327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5839a256b56cb644d8a76fa40da0f339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce733aaa0bf65084fedbf529da36ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e668f6e2cbdb731bac88892e47fddf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e10f2f74e201f77f853e9ed9078615c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8140a39887c6b0b3f26b226c090a3127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78908ea2f65b1af56be13743cf5c3faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf87d2d47a420aee5be760a6de0d3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a28198a932f4f9a93a4c613bbc2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce733aaa0bf65084fedbf529da36ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e668f6e2cbdb731bac88892e47fddf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e10f2f74e201f77f853e9ed9078615c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0f8b318bae5924c4d2b0194946f259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54d77d1248bbd1398a828a3389ce78f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ba468c3d2d7b3fa8e65885bfacf4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d813f3ca8db41a4db6c18eac30fef98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d813f3ca8db41a4db6c18eac30fef98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21ab17f8694a07cfcc9e63389b34690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5d0896cc32b7f445c3dab320482515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce224c28ca451c4f105dc3b077736cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eded65284816fdf6bf335b0c2a78e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a81decee0ccfa372af8951ca73ada38a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21ab17f8694a07cfcc9e63389b34690.png)
(3)两个有限项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043d21c4badb8e2bd98390c7f1c25822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b3cf64372426d1d2faff63d34fdcd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
4 . 已知函数
.
(1)若
在
,
处导数相等,证明:
;
(2)在(1)的条件下,证明:
;
(3)若
,证明:对于任意
,直线
与曲线
有唯一公共点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480c7f80819f8c70c3ca19234c8df5e1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971905ea129aec0ca7c325f60260c7e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a93969738a9bb969f40cf587f1d5d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c278074d0c3c86d4f1c5173085869f68.png)
(2)在(1)的条件下,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7008a5f3b6932c88b451929dc454e7.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1dd754362549d8fb06c522c6c4bd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93cdd3d8ab4fd099527d94e2613efca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
您最近一年使用:0次
名校
解题方法
5 . 已知圆
点
,直线
与圆
交于
两点,点
在直线
上且满足
.若
,则弦
中点
的横坐标的取值范围为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f54dd475ff1321041c80738b201c3b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd8cb171425253834dfd7fa1a9da9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a504ffddb0c711412cd004d0874ebd55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3fd36f2de6c25d432b32c290e6b591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2020/5/7/2457820682854400/2458178292973568/STEM/181c2dc694a74a0bb8bbe0d1532ed853.png?resizew=149)
您最近一年使用:0次
2020-05-08更新
|
2687次组卷
|
8卷引用:调研测试二(B卷 滚动提升检测)-2021年高考数学(理)一轮复习单元滚动双测卷
(已下线)调研测试二(B卷 滚动提升检测)-2021年高考数学(理)一轮复习单元滚动双测卷(已下线)预测04 平面解析几何-【临门一脚】2020年高考数学三轮冲刺过关(江苏专用)2020届江苏省南京市十校高三下学期5月调研数学试题江苏省南通市如皋中学2020届高三创新班下学期第一次高考模拟冲刺数学试题2020届河北省衡水中学高三下学期三模数学(理)试题安徽省阜阳市太和第一中学2020-2021学年高二(奥赛班)上学期期中数学试题(已下线)专题10 《圆与方程》中的取值范围与最值问题(2)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)重庆市南开中学校2022-2023学年高一下学期第二次月考数学试题
名校
解题方法
6 . 如图,已知抛物线
的焦点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/f94cfe30-8d9b-4fa0-a106-e1f4a59a7d3a.png?resizew=134)
若点
为抛物线上异于原点的任一点,过点
作抛物线的切线交
轴于点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
,
是抛物线上两点,线段
的垂直平分线交
轴于点
(
不与
轴平行),且
.过
轴上一点
作直线
轴,且
被以
为直径的圆截得的弦长为定值,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/f94cfe30-8d9b-4fa0-a106-e1f4a59a7d3a.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fd644cd54380df6f9f27c75bb2450e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c6ba69264c8f203cd756581bc6280a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc5bc4d240236523c95e3ca839dfbb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218590c23e700d37ab514bd8f8430edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
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7 . 若等差数列
满足
则
的最大值为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd97dae9e9c0ea21db5646ef88999f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364f2e680e15ca52f466c10dc90287c4.png)
您最近一年使用:0次
2020-05-06更新
|
800次组卷
|
4卷引用:【讲】 专题3 数列范围(最值)问题
名校
解题方法
8 . 已知
四点均在半径为
(
为常数)的球
的球面上运动,且
,
,
,若四面体
的体积的最大值为
,则球
的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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2020-05-04更新
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2613次组卷
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3卷引用:重庆市南开中学2019-2020学年高三下学期(线上测试)期中数学(理)试题
重庆市南开中学2019-2020学年高三下学期(线上测试)期中数学(理)试题(已下线)专题7-1 立体几何压轴小题:截面与球(讲+练)-1云南省曲靖市沾益区第四中学2020-2021学年高二5月月考数学(理)试题
名校
解题方法
9 . 已知函数
,若关于
的方程
有四个不等实根,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf786a0f3f55a5078e323c8ebb529b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fca7b109c2785aa0e76787097d944b7.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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2020-05-03更新
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2105次组卷
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6卷引用:2020届陕西省西安市曲江第一中学高三下学期3月第五次模考理科数学试题
2020届陕西省西安市曲江第一中学高三下学期3月第五次模考理科数学试题(已下线)专题14 利用函数有零点(方程有根)求参数值(取值范围)常用的方法-备战2022年高考数学之学会解题必备方法技巧规律(全国通用)(已下线)第四章 导数与函数的零点 专题三 复合函数零点问题 微点2 复合函数零点问题(二)黑龙江省哈尔滨师范大学附属中学2021-2022学年高三上学期第一次月考数学(理)试题甘肃省名校2021-2022学年高三上学期第一次月考 数学(理)试题天津市九校联考2022届高三下学期一模数学试题
名校
10 . 已知函数
.
求
的解析式及单调区间;
已知
,且
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/972dea38c395a5989d6352ad47a79953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a380067a20c25338eb0312e8df6c2760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb779e8e6b9dd7874c22911477ce05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbc22cdc33878b249e595fe20c3d315.png)
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