解题方法
1 . 已知
.
(1)若
在定义域上单调递增, 求
的取值范围;
(2)设函数
,其中
,若
存在两个不同的零点
.
① 求
的取值范围;
② 证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14eacec687f6768652deffe410bc9d8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00210f79b04a8f6bc1922433d00bc89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe45993e6bd636a4f34886bb3d72f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8ca3aa2d1ba52e82613d0d65d800e7.png)
① 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
② 证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
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2 . 如图所示, 已知
两点的坐标分别为
,直线
的交点为
,且它们的斜率之积
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/ff3b18ce-e09e-4b78-b01b-f2801870a8f6.png?resizew=299)
(1)求点
的轨迹
的方程;
(2)设点
为
轴上 (不同于
)一定点, 若过点
的动直线与
的交点为
, 直线
与 直线
和直线
分别交于
两点, 求证:
的充要条件为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0586ffe4bc516265086c6b5eafd1eed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaebaf8ceed245eba896f36d8ff14b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/ff3b18ce-e09e-4b78-b01b-f2801870a8f6.png?resizew=299)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016b6e707f75bfe9095a6f7caf4f3d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03533fc74743cce18c57438769a85a0d.png)
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3 . 湘潭是伟人故里, 生态宜居之城, 市民幸福感与日倶增.某机构为了解市民对幸福感满意度, 随机抽取了 120 位市民进行调查, 其结果如下: 回答 “满意” 的 “工薪族”人数是 40 人, 回答 “不满意” 的“工薪族”人数是 30 人, 回答“满意”的“非工薪族”人数是 40 人, 回答“不满意” 的 “非工薪族”人数是 10 人.
(1)请根据以上数据填写下面
列联表, 并依据
的独立性检验, 分析能否认为市民对于幸福感满意度与是否为工薪族有关联?
(2)用上述调查所得到的满意度频率估计概率, 机构欲随机抽取部分市民做进一步调查.规定: 抽样的次数不超过
, 若随机抽取的市民属于不满意群体, 则抽样结束; 若随机抽取的市民属于满意群体, 则继续抽样, 直到抽到不满意市民或抽样次数达到
时,抽样结束.记此时抽样次数为
.
(i) 若
, 求
的分布列和数学期望;
(ii) 请写出
的数学期望的表达式 (不需证明), 根据你的理解说明
的数学期望的实际意义.
附:
参考公式:
, 其中
.
(1)请根据以上数据填写下面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bdaf501302beeec9d077be02909e3bd.png)
满意 | 不满意 | 合计 | |
工薪族 | |||
非工薪族 | |||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2ce3da654984c9e711818fad89e57a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d0f3799612b81e85b87241ec8eee68.png)
(i) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45cf86650443d1b86c79b1e3edc7e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35a699306f23d6329e8764f53b9f3f1a.png)
(ii) 请写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d0f3799612b81e85b87241ec8eee68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d0f3799612b81e85b87241ec8eee68.png)
附:
0.050 | 0.010 | 0.005 | |
3.841 | 6.635 | 7.879 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
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3卷引用:湖南省湘潭市2022-2023学年高三上学期入学摸底考试数学试题
名校
4 . 如图,在四棱锥
中,已知四边形
是梯形,
∥
,
,
,
是正三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/9e3b72f8-3938-40a6-bb69-9a426b75c417.png?resizew=149)
(1)求证:
;
(2)当四棱锥
体积最大时,求:
①点A到平面
的距离;
②平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2a696b84492a736c5b444e61b7ad96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/9e3b72f8-3938-40a6-bb69-9a426b75c417.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60964e720188e325eb18c9528b1fa95.png)
(2)当四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
①点A到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
②平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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2卷引用:湖南省湘潭市2022-2023学年高三上学期入学摸底考试数学试题
解题方法
5 . 设
的内角
的对边分别为
,
为钝角,且
.
(1)探究
与
的关系并证明你的结论;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f44eb5f3279ca91dd1c110fdb4b3b6.png)
(1)探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e541f56ea4827edcd9ef463aa8e0b0.png)
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湖南省湘潭市2022-2023学年高三上学期入学摸底考试数学试题(已下线)专题4-4 三角函数与解三角形大题综合归类 - 2河北省邯郸市部分学校2023届高三上学期11月月考数学试题(已下线)专题12 解三角形综合-1
6 . 设数列
的前
项和为
,
,数列
是等差数列, 其前
项和是
, 且
.
(1)求数列
和
的通项公式;
(2)求使得
是数列
中的项的
的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115da54f93de5e89d1e7f443fccb61f8.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/c3ddd6d99ad32dd7fdb1797d8cf94786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24890863a16d6ebf79c2eac3b08dc4d.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/79e1c427d1b5883da14603bb2131c5d3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e74be91bfe4bc209da7539dbf9b72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
7 . 已知双曲线
的右顶点为
, 若以点
为圆心, 以
为半径的圆与双曲线
的一条渐近线交于
两点, 点
为坐标原点, 且
, 则双曲线
的离心率为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec053f40802aa99a5e4c02f2f0b3fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29a5e57dd6a116ac1e2d9711b31b99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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8 . 某灯泡厂对编号为
的十五个灯泡进行使用寿命试验, 得到奇数号灯泡的平均使用寿命 (单位: 小时)为 1580 , 方差为 15000 , 偶数号灯泡的平均使用寿命为 1580 , 方差为 12000 ,则这十五个灯泡的使用寿命的方差为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee9f3e074d4eae7b75b919a09640884.png)
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9 . 设
, 若
, 则
的所有可能取值的个数是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae59dd76f2fb52895c63af6d19645dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36856f61fd29e9d87c0d8a18582a55d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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10 . 设关于
的不等式
的解集为
, 则
的值等于_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a1f86b4a5330727015867732ff6a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cedb12a251019de3487cb0e0607c6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
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