1 . 请从①
;②
;③
这三个条件中任选一个,补充在下列问题中,并加以解答.(如未作出选择,则按照选择①评分)
在
中,a,b,c分别是角A,B,C的对边,若__________.
(1)求角B的大小;
(2)若
为锐角三角形,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2135d486dc571953e077f23e931e919f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc1143c4bfff9b1b2783c350e36ce2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d323eb7501a1c08efd42ea72e45717.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)求角B的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
您最近一年使用:0次
2023-08-01更新
|
929次组卷
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4卷引用:福建省宁德第一中学2020-2021学年高二上学期开学检测数学试题
2 . 已知圆
为圆
上的点,过点
作
轴于点
,点
是直线
上一点,且满足
.
(1)求点
的轨迹
的方程;
(2)设
分别为轨迹
与
轴的左、右交点,
是轨迹
上不同于
的动点,直线
,
与直线
分别交于
两点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dad1c2707ac8e2715465af33926db09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66bf4538a775c075e2a1e4b1b9e2402f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0cb4b2e0a7af501779001e4f6bb6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26389703c40a3c2eac927e372858709.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
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3 . 已知函数
的极值为
.
(1)求
的值;
(2)若
,判断方程
是否恒有解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001d34e5bd26eaf567170acacf03abc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92be82894508d5fd942f8933e736b728.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da5f44c2df223671baa50ee3715be8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94ea992e3f9c206cd3e315d8b968a6f.png)
您最近一年使用:0次
名校
4 . 已知函数
.
(1)当
时,讨论
极值点的个数;
(2)讨论函数
的零点个数的情况.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd95036a3ce62e3967969741a5bc276.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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2024-01-11更新
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609次组卷
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3卷引用:内蒙古赤峰市2021届高三上学期12月双百金科大联考数学(文)试题
内蒙古赤峰市2021届高三上学期12月双百金科大联考数学(文)试题广东省中山市第一中学2024届高三第一次调研数学试题(已下线)专题1.8 导数的零点问题(强化训练)-2023-2024学年高二数学下学期重难点突破及混淆易错规避(人教A版2019)
解题方法
5 . 已知函数
,
.
(1)若
,求
的取值范围;
(2)当
时,若方程
在
上存在实数根,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ec4b7dcb398beead015b581aae90b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ad870ff688c3a7915654978323d4c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1279ef84071f5ad7c4c1681357edd84.png)
您最近一年使用:0次
2023-08-02更新
|
112次组卷
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2卷引用:陕西省延安市延安新区2020-2021学年高二上学期学生发展水平调研检测(期末)理科数学试题
6 . 已知椭圆
,点
在椭圆上,如图,用
表示椭圆在点
处切线的单位向量.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/198f7b15-d256-45b8-8ad4-3cc9057793bf.png?resizew=120)
(1)设
,求
的最大值;
(2)是否存在定圆
,使得圆
的任一切线与
的交点
满足
,若存在,求出圆
方程,若不存在,请说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a6e483672a226118dff5a39aa28449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4fbb5a4568dd3e4baec9f8358552b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e8744362c6e224146461b97faf9821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/198f7b15-d256-45b8-8ad4-3cc9057793bf.png?resizew=120)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75874285daf265905257368573ded035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)是否存在定圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a21698cc2ceabd28d995692ab2bfc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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名校
解题方法
7 . 《文心雕龙》中说“造化赋形,支体必双,神理为用,事不孤立”,意思是自然界的事物都是成双成对的.已知动点
与定点
的距离和它到定直线
:
的距离的比是常数
.若某条直线上存在这样的点
,则称该直线为“成双直线”.则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7b07ace87ed58fdc1f1bc78a04aeda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6e58ec5a07d7cc3248812b4cee2863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.动点![]() ![]() |
B.动点![]() ![]() ![]() |
C.直线![]() ![]() |
D.若直线![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-12-11更新
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1095次组卷
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9卷引用:四川省仁寿一中北校区2019-2020学年高二上学期期中考试理科数学试题
四川省仁寿一中北校区2019-2020学年高二上学期期中考试理科数学试题浙江省A9协作体2022-2023学年高二上学期期中联考数学试题四川省眉山中学校2022-2023学年高二上学期期中考试数学(理)试题吉林省长春市博硕学校(原北京师范大学长春附属学校)2022-2023学年高二上学期期中数学试题山东省东营市2022-2023学年高二上学期期末考试数学试题黑龙江省哈尔滨师范大学附属中学2022-2023学年高二上学期期末考试数学试题(已下线)专题21 圆锥曲线中的轨迹方程的求法-2广西玉林市北流市实验中学等四校2023-2024学年高二上学期期中联考质量评价检测数学试题黑龙江省哈尔滨市第九中学校2023-2024学年高二上学期12月月考数学试题
名校
8 . 已知函数
(
自然对数的底数)有两个零点.
(1)求实数
的取值范围;
(2)若
的两个零点分别为
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e29195d6aa7d730230fab62b66c3a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcd143a57a268a5a8ef486e2a4d5c0a.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5aee4ae5e9dc576e565a899609c8159.png)
您最近一年使用:0次
9 . 已知直线
分别与函数
和
的图象交于点
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501a6d50c937729c8d0f02b2b62a0ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3fe2ef17248ee89e1ca43c0db267a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-09-10更新
|
759次组卷
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4卷引用:辽宁省大连市第八中学2020-2021学年高三上学期期中考试数学试题
辽宁省大连市第八中学2020-2021学年高三上学期期中考试数学试题(已下线)模块二 专题1 集合,简易逻辑与不等式 单元检测篇 B提升卷2024届高三新高考改革数学适应性练习(九省联考题型)(已下线)专题2 点点距离 构造函数 练
名校
解题方法
10 . 已知函数
(
为自然对数的底数,
为常数,且
).
(1)当
时,求函数
在区间
上的最值;
(2)若
在
上存在单调递减区间,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd7f49b69623400db8c56dc98f1204b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497199a00f177af4c593e0e715be97f1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次