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9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)

  • 2026-03-10 15:04:34 2026-03-10 15:04:34

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9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)
9.5三定问题及最值(精练)(提升版)(解析版)_2.2025数学总复习_2023年新高考资料_一轮复习_2023年高考数学一轮复习(提升版)(新高考地区专用)

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9.5 三定问题及最值(精练)(提升版) 题组一 定点 1.(2022·成都模拟)已知椭圆 的离心率为 ,且经过点 ,椭圆C的右 顶点到抛物线 的准线的距离为4. (1)求椭圆C和抛物线E的方程; (2)设与两坐标轴都不垂直的直线l与抛物线E相交于A,B两点,与椭圆C相交于M,N两点,O为坐 标原点,若 ,则在x轴上是否存在点H,使得x轴平分 ?若存在,求出点H的坐标; 若不存在,请说明理由.2.(2022·辽宁模拟)已知坐标原点为O,点P为圆 上的动点,线段OP交圆 于点Q,过点P作x轴的垂线l,垂足R,过点Q作l的垂线,垂足为S. (1)求点S的轨迹方程C; (2)已知点 ,过 的直线l交曲线C于M,N,且直线AM,AN与直线 交 于E,F,求证:E,F的中点是定点,并求该定点坐标 3.(2022·烟台模拟)已知椭圆 : ( )的离心率为 ,其左、右焦点分别为 , , 为椭圆 上任意一点, 面积的最大值为1. (1)求椭圆 的标准方程; (2)已知 ,过点 的直线 与椭圆 交于不同的两点 , ,直线 , 与 轴的交 点分别为 , ,证明:以 为直径的圆过定点.题组二 定值 1(2022·河东模拟)椭圆C: 的离心率 , . (1)求椭圆C的方程; (2)如图,A,B,D是椭圆C的顶点,P是椭圆C上除顶点外的任意一点,直线DP交x轴于点N,直线 AD交BP于点M,设MN的斜率为m,BP的斜率为n,证明: 为定值.2.(2022·四川模拟)在直角坐标系xOy中,长为3的线段AB的两端点A,B分别在x,y轴上滑动,动 点M满足 (1)求动点M的轨迹E的方程; (2)设过点 的动直线l与(1)中的轨迹E交于C,D两点,是否存在定实数t,使得 为定值?若存在,求出t的值;若不存在,请说明理由. 3.(2022·西安模拟)已知抛物线C: 的焦点为 ,准线与坐标轴的交点为 , 、 是离心 率为 的椭圆S的焦点. (1)求椭圆S的标准方程; (2)设过原点O的两条直线 和 , , 与椭圆S交于A、B两点, 与椭圆S交于M、N两点.求 证:原点O到直线AM和到直线BN的距离相等且为定值.4.(2022·浙江模拟)已知抛物线 : 经过点 ,焦点为F,PF=2,过点 的直线 与抛物线 有两个不同的交点 , ,且直线 交 轴于 ,直线 交 轴于 . (1)求抛物线C的方程 (2)求直线 的斜率的取值范围; (3)设 为原点, , ,求证: 为定值. 题组三 最值 1.(2022·浙江模拟)如图,已知点 , 分别是椭圆 的左顶点和右焦点, 是 轴上一 点,且在点 左侧,过 和 的直线 与椭圆 交于A,B两点,点B关于x轴的对称点为D.(1)求直线 斜率的取值范围; (2)记 ,MD分别与直线FG交于Q,R两点,求 面积的最小值. 2.(2022·南充模拟)已知点F是抛物线 的焦点,直线l与抛物线C相切于点 ,连接PF交抛物线于另一点A,过点P作l的垂线交抛物线于另一点B. (1)若 ,求直线l的方程; (2)求三角形PAB面积S的最小值.题组四 定直线 1.(2022·宜宾模拟)设抛物线 : ,以 为圆心,5为半径的圆被抛物线 的准 线截得的弦长为8. (1)求抛物线 的方程; (2)过点 的两条直线分别与曲线 交于点A,B和C,D,且满足 , ,求证: 线段 的中点在直线 上. 2.(2022·和平模拟)已知点M是椭圆C: 上一点, , 分别为椭圆C的上、 下焦点, ,当 , 的面积为5. (1)求椭圆C的方程: (2)设过点 的直线 和椭圆C交于两点A,B,是否存在直线 ,使得 与 (O是坐标原 点)的面积比值为5:7.若存在,求出直线 的方程:若不存在,说明理由.3.(2022·齐齐哈尔模拟)已知点F为抛物线 的焦点,点 在抛物线C上,且 ,直线 交抛物线C于A,B两点,O为坐标原点. (1)求抛物线C的方程; (2)若直线 交抛物线C于M,N两点,直线AM与BN交于点T,求证:点T在定 直线上. 4.(2022·聊城模拟)已知椭圆C: 的离心率为 ,左顶点为 ,左焦点为 , 上顶点为 ,下顶点为 ,M为C上一动点, 面积的最大值为 . (1)求椭圆C的方程; (2)过 的直线l交椭圆C于D,E两点(异于点 , ),直线 , 相交于点Q,证明: 点Q在一条平行于x轴的直线上.5.(2022·河南模拟)已知椭圆 的左、右顶点分别为 ,且过点 . (1)求C的方程; (2)若直线 与C交于M,N两点,直线 与 相交于点G,证明:点G在 定直线上,并求出此定直线的方程.
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  1. CONNECT:[ UseTime:0.000742s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001159s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.009244s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001474s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001104s ]
  6. SELECT * FROM `set` [ RunTime:0.000463s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001240s ]
  8. SELECT * FROM `wendang` WHERE `id` = 374220 LIMIT 1 [ RunTime:0.001443s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 374220 [ RunTime:0.029582s ]
  10. UPDATE `wendang` SET `lasttime` = 1773132337 WHERE `id` = 374220 [ RunTime:0.006196s ]
  11. SELECT * FROM `wendang` WHERE `id` < 374220 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.007763s ]
  12. SELECT * FROM `wendang` WHERE `id` > 374220 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001131s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 374220 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000858s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 374220 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002462s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 374220 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003218s ]
0.194242s