1 . 设
,函数
.
(1)若
,求函数
在区间
上的最大值;
(2)若存在
,使得关于x的方程
有三个不相等的实数解,求实数t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b488f93caaa476d10edd8ca152d173d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f979b19f87f2c7e171d6061d56cb7bf8.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a29c0b421e1fa450c30720a3442686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4354048d0eb1ddb2e15b0ae9af159c.png)
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2019高一·浙江·专题练习
2 . 已知函数
,
.
(1)求
的表达式;
(2)求方程
解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e40b4ec8419f2675818211636ded2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51dfb7cd5be57079926833a20ffcd5f0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee5a2f7ecc2914a07f335124dde2263a.png)
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解题方法
3 . 已知函数
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0e28e5d116fcffcea4c3533a9c68c4.png)
(1)当
时,求函数
在
上的最大值和最小值;
(2)若方程
恰好有3个不同解
.
(i)求实数
的取值范围;
(ii)比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9375a26bf0e5aee73d959a12349ecb5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0e28e5d116fcffcea4c3533a9c68c4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9724e71a593c906c699b226cc5b46f.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3b851e2da7743f6608b8f8749028b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcee20976de0e0e8c1ccd7a951674691.png)
(i)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
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4 . 已知函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/5eedc2cc-bfff-4d1b-b3a4-ff8e8cfd4c15.png?resizew=171)
(1)用分段函数的形式表示函数
的解析式,并画出
在
上的大致图像;
(2)若关于x的方程
恰有一个实数解,求出实数m的取值范围组成的集合;
(3)当
时,求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7247a12f18390a9f9a997cc87ed6fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/5eedc2cc-bfff-4d1b-b3a4-ff8e8cfd4c15.png?resizew=171)
(1)用分段函数的形式表示函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ff4a1f5d3ad9d7668fe555e70b774c.png)
(2)若关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e31bc0c34811edba74dae3fcaed8f577.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874dcc6d4f0abe55891d240b90c5d6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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5 . 已知函数
在
上是减函数,在
上是增函数
若函数
,利用上述性质,
Ⅰ
当
时,求
的单调递增区间
只需判定单调区间,不需要证明
;
Ⅱ
设
在区间
上最大值为
,求
的解析式;
Ⅲ
若方程
恰有四解,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18426cffd99829508032275c2e033810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fef9380b394a4bd829c83a5a5b4c859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d45793b96fcc2aa90c8555b1c5157af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66d894b35f3636c16c3455e809a867d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5036e26e77152eb05955d2aceca93950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c13a09123ae873e0b0501aaecc507e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c13a09123ae873e0b0501aaecc507e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c7a1c25073f5b206135366a1fedc98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06dffc1e1569287ae3a29dcad8ce1401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4845ea2f5b15977cf713a1794b596589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b982ddacd48538d93a6e6ebb10395d.png)
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2019-02-07更新
|
279次组卷
|
4卷引用:【校级联考】浙江省温州九校联盟2018-2019学年高一第一学期期末数学试题
名校
解题方法
6 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511b5e2d1629ade61c3be1a881f7b8a7.png)
,
(1)当
时,求
在区间
上最大值和最小值;
(2)如果方程
有三个不相等的实数解
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511b5e2d1629ade61c3be1a881f7b8a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e5ff2705eb737adef9a6dc70559d79.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f409d09ee4c68dd167d9dc62dd58a4.png)
(2)如果方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52079d948ae0e1f1d112b3ac76142f1a.png)
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名校
7 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e680f81ac90f96c87af45a5485342fe.png)
(1)求
的值;
(2)试判断方程
解的个数,并判断其中一个解是否在区间
内.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3886c975373ab74155b5b9cf16049ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e680f81ac90f96c87af45a5485342fe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81917274e448bdd30e00cd0f51548663.png)
(2)试判断方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8bfb563f79688d136e0cb958b5153c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
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