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1 . 火电厂、核电站的循环水自然通风冷却塔是一种大型薄壳型构筑物.建在水源不十分充足的地区的电厂,为了节约用水,需建造一个循环冷却水系统,以使得冷却器中排出的热水在其中冷却后可重复使用,大型电厂采用的冷却构筑物多为双曲线型冷却塔.此类冷却塔多用于内陆缺水电站,其高度一般为75~150米,底边直径65~120米. 双曲线型冷却塔比水池式冷却构筑物占地面积小,布置紧凑,水量损失小,且冷却效果不受风力影响;它比机力通风冷却塔维护简便,节约电能;但体形高大,施工复杂,造价较高.(以上知识来自百度,下面题设条件只是为了适合高中知识水平,其中不符合实际处请忽略.)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/c7842de3-87fa-47f5-ade5-71fb0145e144.png?resizew=107)
(1)如图为一座高100米的双曲线冷却塔外壳的简化三视图(忽略壁厚),其底面直径大于上底直径,已知其外壳主视图与左视图中的曲线均为双曲线,高度为100
,俯视图为三个同心圆,其半径分别40
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb950416953a22cbd20182188b0cd4c.png)
,30
,试根据上述尺寸计算视图中该双曲线的标准方程(
为长度单位米);
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/39573f23-d44a-430b-9398-a896b202b94f.png?resizew=161)
(2)试利用课本中推导球体积的方法,利用圆柱和一个倒放的圆锥,计算封闭曲线:
,
,绕
轴旋转形成的旋转体的体积多少?(用
表示).(用积分计算不得分)现已知双曲线冷却塔是一个薄壳结构,为计算方便设其内壁所在曲线也为双曲线,其壁最厚为0.4
(底部),最薄处厚度为0.3
(喉部,即左右顶点处),试计算该冷却塔内壳所在的双曲线标准方程是?并计算本题中的双曲线冷却塔的建筑体积(内外壳之间)大约是多少
;(计算时
取3.14159,保留到个位即可)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/4f3b4732-84ed-4c2a-948d-24d17a7688bc.png?resizew=251)
(3)冷却塔体型巨大,造价相应高昂,本题只考虑地面以上部分的施工费用(建筑人工和辅助机械)的计算,钢筋土石等建筑材料费用和和其它设备等施工费用不在本题计算范围内.超高建筑的施工(含人工辅助机械等)费用随着高度的增加而增加,现已知:距离地面高度30米(含30米)内的建筑,每立方米的施工费用平均为:400元/立方米;30米到40米(含40米)每立方米的施工费用为800元/立方米;40米以上,平均高度每增加1米,每立方米的施工费用增加100元.试计算建造本题中冷却塔的施工费用(精确到万元).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/c7842de3-87fa-47f5-ade5-71fb0145e144.png?resizew=107)
(1)如图为一座高100米的双曲线冷却塔外壳的简化三视图(忽略壁厚),其底面直径大于上底直径,已知其外壳主视图与左视图中的曲线均为双曲线,高度为100
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb950416953a22cbd20182188b0cd4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/39573f23-d44a-430b-9398-a896b202b94f.png?resizew=161)
(2)试利用课本中推导球体积的方法,利用圆柱和一个倒放的圆锥,计算封闭曲线:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b930a9ba90cdd9e62d8a3892125825c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e51aff9ae2fa123ae63f19478db507.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36accab23dbd172687769aea43e5781c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/4f3b4732-84ed-4c2a-948d-24d17a7688bc.png?resizew=251)
(3)冷却塔体型巨大,造价相应高昂,本题只考虑地面以上部分的施工费用(建筑人工和辅助机械)的计算,钢筋土石等建筑材料费用和和其它设备等施工费用不在本题计算范围内.超高建筑的施工(含人工辅助机械等)费用随着高度的增加而增加,现已知:距离地面高度30米(含30米)内的建筑,每立方米的施工费用平均为:400元/立方米;30米到40米(含40米)每立方米的施工费用为800元/立方米;40米以上,平均高度每增加1米,每立方米的施工费用增加100元.试计算建造本题中冷却塔的施工费用(精确到万元).
您最近一年使用:0次
2019-09-23更新
|
680次组卷
|
2卷引用:上海市宝山区交大附中2018-2019学年高二下学期期中数学试题
2024高三·全国·专题练习
解题方法
2 . 正三棱柱
中,试确定侧面
及
上对角线
垂直于
的条件.(写出一个即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
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3 . 圆锥曲线的弦与过弦的端点的两条切线所围成的三角形叫做阿基米德三角形. 在一次以“圆锥曲线的阿基米德三角形”为主题的数学探究活动中,甲同学以如图示的抛物线C:
的阿基米德三角形
为例,经探究发现:若AB为过焦点的弦,则:①点P在定直线上;②
;③
.已知△PAB为等轴双曲线
的阿基米德三角形,AB过Γ的右焦点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/2c4f1e56-4c1b-4014-aa73-46513a3a6325.png?resizew=128)
(1)试探究甲同学得出的结论,类比到此双曲线情境中,是否仍然成立?(选择一个结论进行探究即可)
(2)若
,弦AB的中点为Q,
,求点P的坐标.
(注:双曲线
的以
为切点的切线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80406e8beb743b122bd7b021671c780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c3c86c301da44a5b7ff517de9fb5b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/2c4f1e56-4c1b-4014-aa73-46513a3a6325.png?resizew=128)
(1)试探究甲同学得出的结论,类比到此双曲线情境中,是否仍然成立?(选择一个结论进行探究即可)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2f2d7c81cb44416bcdf59419637682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f0183710522f3ef628c3371b37282f.png)
(注:双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6a4781b020b879519321e05c299f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2754b23c3b3c72d8078864aa6b3ff45f.png)
您最近一年使用:0次
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4 . 椭圆满足这样的光学性质:从椭圆的一个焦点发射光线,经椭圆反射后,反射光线经过椭圆的另一个焦点.如果没有阻挡,此过程可以不断重复进行下去.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/b0538397-e456-4c40-8ccc-67fdd26e1ad3.png?resizew=227)
(1)椭圆
,
分别为其左、右焦点.试问,从
发射的光线,经椭圆反射后第一次回到
时,光线经过的路程
的最大值和最小值分别为多少?(写出结论即可,无须说明)
(2)如图,椭圆
的左、右焦点分别为
,从
发射的光线,经椭圆上两点
处分别反射后,光线回到
,已知
,
,求椭圆
的离心率
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/b0538397-e456-4c40-8ccc-67fdd26e1ad3.png?resizew=227)
(1)椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6533a2123bcaa8c7dcd36d5e3f37700f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(2)如图,椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9cdcc25290844c9d4c088bf58afada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec24e02ffc2eeaeb0fdb41279ed4d497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f796f8a7de6ae278f2187e8917cd536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
您最近一年使用:0次
5 . 阅读材料:
(一)极点与极线的代数定义;已知圆锥曲线G:
,则称点P(
,
)和直线l:
是圆锥曲线G的一对极点和极线.事实上,在圆锥曲线方程中,以
替换
,以
替换x(另一变量y也是如此),即可得到点P(
,
)对应的极线方程.特别地,对于椭圆
,与点P(
,
)对应的极线方程为
;对于双曲线
,与点P(
,
)对应的极线方程为
;对于抛物线
,与点P(
,
)对应的极线方程为
.即对于确定的圆锥曲线,每一对极点与极线是一一对应的关系.
(二)极点与极线的基本性质、定理
①当P在圆锥曲线G上时,其极线l是曲线G在点P处的切线;
②当P在G外时,其极线l是曲线G从点P所引两条切线的切点所确定的直线(即切点弦所在直线);
③当P在G内时,其极线l是曲线G过点P的割线两端点处的切线交点的轨迹.
结合阅读材料回答下面的问题:
(1)已知椭圆C:
经过点P(4,0),离心率是
,求椭圆C的方程并写出与点P对应的极线方程;
(2)已知Q是直线l:
上的一个动点,过点Q向(1)中椭圆C引两条切线,切点分别为M,N,是否存在定点T恒在直线MN上,若存在,当
时,求直线MN的方程;若不存在,请说明理由.
(一)极点与极线的代数定义;已知圆锥曲线G:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725a9d6a7c0cd596ece7f4c888b40510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8f8c1244657aec3fe29890c4681414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d902a46e5e698f08b6e82c887cee9647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1677a6b74dc0182296d2fb525ce564b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9656735f55e5de465e5667ba578d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc49a26cb0c64cea942bff447becfdbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7555cd38f338e8758f5f73e10c08dc0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f9185c7d48b015d9cd0525616b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba380c2fbc3e6c45bb1dc28a15e219a.png)
(二)极点与极线的基本性质、定理
①当P在圆锥曲线G上时,其极线l是曲线G在点P处的切线;
②当P在G外时,其极线l是曲线G从点P所引两条切线的切点所确定的直线(即切点弦所在直线);
③当P在G内时,其极线l是曲线G过点P的割线两端点处的切线交点的轨迹.
结合阅读材料回答下面的问题:
(1)已知椭圆C:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(2)已知Q是直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bbd45a300cd506c9d2bbf8f6ac3498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940f1047bde206726ab05cfd6785067d.png)
您最近一年使用:0次
2023-02-19更新
|
1367次组卷
|
7卷引用:贵州省贵阳市普通中学2022-2023学年高二上学期期末监测考试数学试题
贵州省贵阳市普通中学2022-2023学年高二上学期期末监测考试数学试题(已下线)第五篇 向量与几何 专题5 调和点列 微点4 调和点列综合训练(已下线)重难点突破18 定比点差法、齐次化、极点极线问题、蝴蝶问题(四大题型)(已下线)专题22 新高考新题型第19题新定义压轴解答题归纳(9大题型)(练习)辽宁省名校联盟2023-2024学年高二下学期4月联合考试数学试卷河南省信阳市新县高级中学2024届高三4月适应性考试数学试题(已下线)模型9 极点极线问题模型
名校
6 . 下列各题中,命题p是命题q的什么条件?(填“充分不必要条件”,“必要不充分条件”,“充要条件”,“既不充分也不必要条件”)(只写答案即可)
(1)
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a871ef7bf13de3e15489d65b57a3cc.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8389b5845314bef7412341c36d014ce.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f3c89e41f778ad417cc0eec1544e0f.png)
(4)
某四边形是菱形
某四边形对角线相互垂直
(5)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc539c71b72aff71e7c8e31e74969d1.png)
(6)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284b3586c879f13f0ccb3319672e0f9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ab9408d72b2185996182108575fc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a871ef7bf13de3e15489d65b57a3cc.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2f40a4c50312b5f18f179020ae1381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8389b5845314bef7412341c36d014ce.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efaaaf9a43f1ca71d4ab50ca94d39e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f3c89e41f778ad417cc0eec1544e0f.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d229cbec798c9c278a9b5979cb38247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc539c71b72aff71e7c8e31e74969d1.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a479511a50da604b2fc7398617db8387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6204ebd38f7dcba36e4086998680046c.png)
您最近一年使用:0次
2023-07-31更新
|
212次组卷
|
2卷引用:山东省东营市利津县高级中学2022-2023学年高一上学期10月月考数学试题
解题方法
7 . 已知椭圆
与直线l:
有唯一的公共点M.
(1)当
时,求点M的坐标;
(2)过点M且与l垂直的直线分别交x轴、y轴于
,
两点.当点M运动时,
(i)求点
的轨迹方程,并说明轨迹是什么曲线;
(ii)如果推广到一般椭圆,能得到什么相应的结论?(直接写出结论即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddab7b8aa22e1ba4c59da7dc04ac9e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5464dc3bd349a216296fbaa879ae47.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
(2)过点M且与l垂直的直线分别交x轴、y轴于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e5725eea66482aecf029044c404f24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48001aa635215e2be1eed43a572621a.png)
(i)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
(ii)如果推广到一般椭圆,能得到什么相应的结论?(直接写出结论即可)
您最近一年使用:0次
8 . 已知函数
,
.
(1)当
时,求
的解集;
(2)求使
的
的取值范围;
(3)写出“函数
在
上的图象在
轴上方”的一个充分条件.(直接写出结论即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b14ddea7512b395c31028251c1d2323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
(2)求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)写出“函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4cf16e39bff4aa2d482c90411d5ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2020-03-02更新
|
442次组卷
|
2卷引用:北京市大兴区2019-2020学年高二第一学期期中考试数学试题
2024高三·全国·专题练习
9 .
、
、
是海上三个救援中心,
在
的正东方向,相距
,
在
的北偏西
,相距
,
为海面上一艘油轮.某一时刻,
发现
的求救信号,由于
、
两地比
距
地远,因此
后,
、
两地才同时发现这一信号,该信号的传播速度为
.
(1)
若救援
,求在
处发现
的方位角;
(2)若信号
在空间中被发现,
的位置在何处时,才能使
、
收到的时间差小于
.(只需写出一种位置即可)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57601db9d81fffe2b6b472db94c3c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bd4f1b3a3f3e534c5c3b39266f1ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f6524582d60e8a4ccbe45abf7713e.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/a9e79eddc377b5b870c035a594ddb769.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若信号
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.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/dc9f6524582d60e8a4ccbe45abf7713e.png)
您最近一年使用:0次
名校
10 . 已知
,
.
(1)若
为真,则实数
的取值集合为__________________ (直接写答案即可)
(2)若
是
成立的必要不充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c3fd3d48e4296ddefdd1e3ced7aba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed924b38955307f8b93fded49a34a714.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次