名校
解题方法
1 . 已知a为实数,函数
,
.
(1)设
,
,若函数
的最大值等于2,求a的值;
(2)若对任意
,都存在
,使得
,求a的取值范围;
(3)设
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1c079afd1b058adc67a50f48f3d466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6076f2c305797168a666280436eb6e8f.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605705b3da667e82dd7787b4741b261e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77156221148913fb706a2d57d9b9100c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327e81d90543aa594968112a73bfa2ad.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b3a5b4f2b7279a7aa94f8ec12b3f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3b1d05315ce6c73c0ad0500845a409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cf4f9640637c4ec7804da532b6a819.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b200636f87441fc3e8788675391f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
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2 . 下列说法正确的是( )
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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名校
解题方法
3 . 如果函数
的定义域为
,对于定义域内的任意x,存在实数a使得
成立,则称此函数具有“
性质”.
(1)判断函数
是否具有“
性质”,若具有“
性质”求出所有a的值;若不具有“
性质”,请说明理由.
(2)已知
具有“
性质”,且当
时
,求
在
上的最大值.
(3)设函数
具有“
性质”,且当
时,
.若
与
交点个数为2023个,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80a01118f21516915cb177acc3d1220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c410536b4b795809f155e107bed17f.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c410536b4b795809f155e107bed17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c410536b4b795809f155e107bed17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c410536b4b795809f155e107bed17f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e691589e9aafddefcbb613c7030f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b74d89854116e411c089d053df053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f572a9d4d946843a178e90fa5e5800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304226ca50149b49702928e44d565964.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86c2570913b742194ae5cbb698d37d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06ba630c1ea702753cb6bbc8099aafd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dcff07bb0d9e583a534c663ba2477f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cca39b30b0b8e769293e13546b91f35.png)
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4 . 甲船在
岛的正南方向
处,
千米,甲船以4千米/小时的速度向正北方向航行,同时,乙船自
岛出发以6千米/小时的速度向北偏东
的方向驶去,航行时间不超过2.5小时,则当甲、乙两船相距最近时,它们航行的时间是______ 小时.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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5 . 在
中,过重心G的直线与
边交于P,与
边交于Q,点P,Q不与B,C重合.设
面积为
,
面积为
,
,
.
(1)求
;
(2)求证:
;
(3)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41f02922d11b0db07583b49135d73a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d9d8a55bf739736288c0be3607490a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9802946e68ae1c7153b4496ee14735.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08677c8308807e4dca6fd9410d301a39.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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解题方法
6 . 正方形ABCD的边长为6点E,F分别在边AD,BC上,且
,
.如果对于常数
,在正方形ABCD的四条边上(不含顶点)有且只有6个不同的点P,使得
成立,那么
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580762c6dee39529546a08f6e0860419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0ce7aaca2b6725dac7ed5d2a437aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cecd19ac0e7394907eaed7e65e409ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
7 . 如图,在等腰梯形
中,
,
,点
为边
上靠近点
的六等分点,
为
中点.
表示
;
(2)设
为
中点,
是线段
(不含端点)上的动点,
交
于点
,若
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a68895db9b734487593646438653ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7ae2f931da35ad6cd16e2dec974f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae54940f33b8714da5fe3b7546f8b3dc.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61197405c5bc077c5944d0243310b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a14346c46472cf74b617fd26784b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53351d85954737437000906554e8283.png)
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8 . 已知复数
满足方程
,其中
为虚数单位,
.
(1)当
,
时,求
;
(2)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f69e3255ff84975233b95ed710fe5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de971553ea8a66d7849b138a4a0625c5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4c824a8dd94738f10749ceb22df792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba233c200cb6f4f156569cac95c448a.png)
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9 . 已知
,
,且
,则
的最小值是______ ;当
取得最小值时,
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6d474e6cd19b54fcc32889975ceb9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af4669c96dd79a2e582f744fc1bc442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af4669c96dd79a2e582f744fc1bc442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a042f7647c4310c80f7ffe144c81c0e.png)
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解题方法
10 . 已知
(
且
)是指数函数.
(1)求关于x的不等式
的解集;
(2)函数
在区间
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443f79de69ddf3a3e9871366804aadd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)求关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af3805f722964d881a001cc5936b5fb.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f4b026104086da528964fa6c9d56ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a43ded43fac49796bcc2142670802c.png)
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