解题方法
1 . 已知函数
为偶函数,满足
,且
时,
,若关于
的方程
有两解,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af95e4cded0c3545549d5b55b0d1375e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2222b10f3189590dfa35385970ce40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e42ad2b8aa847687969fde4ba17859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d2d6e783f73d37c335bf85b2bb791b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 定义在R上的偶函数
满足
,且当
时,
,若关于x的方程
恰有5个实数解,则实数m的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3b657ebd1733b4f19dcbec44919924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf266c400ec9f20afcdb1c76a62c6c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c5aa086a6402d0a88d5dd1b3ae358f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024·全国·模拟预测
3 . 已知函数
,若方程
有7个不同的实数根,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49de18996f7bfa04424a34251417af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24ee772d9cbb66dc987712a395544446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 若关于
的方程
有两个不同的实根
,
,且
,则实数
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529486e4a752b00da43865f01155bc38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322c41fdd11ebee5060a2d45259c785e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2024·全国·模拟预测
解题方法
5 . 已知函数
,将
的图象上的所有点向左平移
个单位长度得到
的图象,若
是偶函数,
在
上恰有2个零点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5beaa08e78b69f1826534e45a9b2da45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.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/d01dc2d99655cf7598837cb0886166ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
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2024·全国·模拟预测
6 . 已知方程
恰有两个不同的根,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964a087b65f5e163ffe5ba4fc375e6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024高三下·全国·专题练习
7 . 已知函数
.
(1)当
时,求曲线
在
处的切线方程;
(2)若函数
在
和
上各有一个零点,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af6f7f04c76ab6cbeba20ac82edda39.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dfb40e73722bac7b01161e19d1fde35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbd5fbcb0ed2ac6d94982bc35a4f6b6.png)
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8 . 设函数
在
上有且仅有1个极值点和1个零点,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9429ade94a205c5e354596df5bc1f71c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579b9c272915b330e5fc8766885f99e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbb2b6c196e5e15f85900eb4325513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 已知函数
(
),若
在
上有两个零点,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2630e5d1175e4277c41c8283c6c56490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e5257c3efa20386fa295fa96819200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024·全国·模拟预测
10 . 已知函数
恰有一个零点
,且
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a06a559d5f2422feff68632ae74a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c76a301aa71bda7557fc53777cc5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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