21-22高三上·浙江宁波·开学考试
1 . 以抛物线
上两点A,B为直径的圆
与x轴相切于N点,与y轴相交于P,Q两点,直线AB交x轴于M,则
的最大值是________ ,此时点N坐标为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdee9e81d0d6f7874bb619976eda6c83.png)
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2 . 如图,已知
和抛物线
是圆
上一点,M是抛物线
上一点,F是抛物线
的焦点.
![](https://img.xkw.com/dksih/QBM/2021/6/3/2735096321589248/2735881169477632/STEM/8efff9db-ef21-4bae-9de0-f271f0870ffd.png?resizew=181)
(1)当直线
与圆
相切,且
时,求
点的坐标;
(2)过P作抛物线
的两条切线
分别为切点,求证:存在两个
,使得
面积等于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77208a2d8eef1856d213fde4b88805f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451e94c94277ef7d8e74f3dfef159880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://img.xkw.com/dksih/QBM/2021/6/3/2735096321589248/2735881169477632/STEM/8efff9db-ef21-4bae-9de0-f271f0870ffd.png?resizew=181)
(1)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ced5c43c74f54a3a7ceb1bdf6260a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)过P作抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270dcf5882716678ef574e71273e0a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
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解题方法
3 . 定义:函数
,
的定义域的交集为
,
,若对任意的
,都存在
,使得
,
,
成等比数列,
,
,
成等差数列,那么我们称
,
为一对“
函数”,已知函数
,
,
.
(Ⅰ)求函数
的单调区间;
(Ⅱ)求证:
;
(Ⅲ)若
,对任意的
,
,
为一对“
函数”,求证:
.(
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b426608a06477f57cb994f4d00e4465d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f121036d30c000b01b7be98d9c8a99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e685edd2226794e07c27f60acec2c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4994b0dae849313166b4dc20049a8650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc1bc250c8a6523a1be394ff48d4a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e413b2bf0d67d3d222246474e71c705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f74219fde8f798ff4b3ad483821c5a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb96975f157002edefc88949eb1904d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b426608a06477f57cb994f4d00e4465d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f121036d30c000b01b7be98d9c8a99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4714fdcec01122e7aba38e3d1ddd388e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdef85d50578d84a92ffcc754f7afddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5ec0e806beaf399bbd30011cd2f0ef.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5dd5964a75ea201244f2c9b62ccbb39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09256752badab8d69ae679796896ed97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e2a5e1c924c41c6ef83a55d003382c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
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