解题方法
1 . 已知函数
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de4ca025b2b50fa656db54f1c750059.png)
A.![]() ![]() |
B.![]() ![]() |
C.“![]() ![]() |
D.若关于![]() ![]() ![]() |
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解题方法
2 . 已知函数
和
的定义域分别为
和
,若对任意
,恰好存在
个不同的实数
,使得
(其中
),则称
为
的“
重覆盖函数”.
(1)试判断
是否为
的“2重覆盖函数”?请说明理由;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53032603fb865dbbd67a26dab0d456e6.png)
为
的“2重覆盖函数”,求实数
的取值范围:
(3)函数
表示不超过
的最大整数,如
.若
为
的“2024重覆盖函数”,求正实数
的取值范围.
![](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/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c296e45b84cf67a98939aa7334e7d478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3eddf991be37d25d033f78bd3511809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d5df7922a4e98e8e07bf418dd48a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe44a5aed663a9b61ef7355b38c77d0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d1a18f254577a0ce74ceb27364b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbce9c20f9084e78be6aac54b4d5574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61baa6786dc0ba48af72d476e3d33d89.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53032603fb865dbbd67a26dab0d456e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/465a56c906fba99ade616775f37cb8f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b1787d2a3cd75a338e043b4f9cc0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d82bab9f2808b11904d680eae089356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d94cba8309230315c53b732226fe917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ad59aa8360aedf4a3513854d8624fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 如图,圆
的圆心在坐标原点,半径为
,动点
从
处开始在圆
上按逆时针方向以
的角速度作匀速圆周运动,则
秒之后,点
的纵坐标
可以表示为
.
和
的值;
(2)若函数
在
上恰有两个零点,求
的取值范围;
(3)若函数
的最小正周期为
,求
在
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770697745870db8c31f5dc4b2cba0aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615870aff609025dfa776138026b82dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9b65c51e37f40211b876be02105701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec7563b1842fa0c05b60ec59f41e17d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c8ca569e742d9eeee3b85f61bd8e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcab9f2b17568fd86e0d41dd174e609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c8ca569e742d9eeee3b85f61bd8e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b0245748f47eb500fbb5671f683fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3466b71d1d9117438ed50388a57d9397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0022582de33cef3b6434918e19fa96a.png)
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2024高三·全国·专题练习
解题方法
4 . 若函数
的图象与函数
的图象交点的横坐标所在的区间为
,则整数k可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10517a25a0ba44d2dccd8d1333743baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84703ad826eb76820d2e2f840c4dd8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77be621343247beabcb7275f52da998.png)
A.![]() | B.0 | C.1 | D.2 |
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2024高三·全国·专题练习
5 . 已知函数
,若关于x的方程
有7个不等的实数根,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cab121fe9ab0184863c9dd00833181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c1e36543db239456e3a8579b1ba66f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f952d980f9c87113407f86814d1d8db.png)
,若方程
有6个根,则
的值可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f952d980f9c87113407f86814d1d8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddea382d8bece5514a9cbd6a225667e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6385ccb7d8a145c8339f03bc143829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.0 | B.![]() | C.![]() | D.1 |
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2024高三·全国·专题练习
7 . 若函数
在
上至少有一个零点.则实数
的取值范围为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb93d10fda229dc4a697f2256783c890.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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8 . 已知
是定义在
上的函数
的导函数,
,且
,若函数
有3个零点,则
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a28068770a85b88b42321cd71ecd3c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3d648d4c8a0b4cb3f49241f60e11e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91770acb583f05c3ead767d247be034.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25079f12119793682bee7dcd103d12e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9 . 已知
有三个不相等的零点
且
,则k的可能取值有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9005d31f181ed70fb3cd2fd44d63fcce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
A.1 | B.![]() | C.![]() | D.![]() |
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10 . 已知函数
.
(1)求
的最小正周期;
(2)若
,求
的值;
(3)将函数
图象上所有点向右平移
个单位长度,再把所有点的横坐标缩短到原来的
,纵坐标不变,得到函数
的图象,若函数
在
上有两个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10ffd7b2489ca8f7e0967c952c8e38e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198f329534aec1574fdab18826fd01af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2528f778a4276a1debb6440942e4dd3.png)
(3)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c59c7d406a609ededabe8eb0577cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4967a77f1ca19fb606497defded211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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