名校
1 . 已知函数
,
.
(1)求函数
的最小正周期和单调增区间;
(2)若不等式
在
上恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190fd60387700515b94fa7b081fd346b.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b791ef4858df886be749c11a7690f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0a5133b8460df6c46da0e44051e2a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2 . 已知实数
,若函数
满足:当
时,
恒成立,则
可取值的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197201f54d2f67312bd64d41bb1b139d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5293fa189c3325a5c03994525e619789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117ddce61379e226df0f97a9c9388029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f035a5c974a73b3f716caf61042bd4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.4 | B.3 | C.2 | D.1 |
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解题方法
3 . 对任意
,指数函数
的值总大于
,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a79d7f73b6128650bf7aed538260c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da53929a8f67b9aa3827fdbd73ebd265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
4 . 对任意实数x,若不等式
恒成立,则实数a的取值范围______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e66d8f19c6ed11fee2cf1b19134c6d.png)
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5 . 设函数
的最小值为m,且
,则n=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb69e48d259239e2b39368b94df16ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb99b4e38a0ff6ff41a4284b0e5e4a5.png)
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6 . 已知函数
(a,b为实数),且
,
.
(1)求a,b;
(2)判断函数
的单调性,并用定义证明;
(3)设
,其中
,若对任意的
,总存在
,使得
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83989a2603255a091cdafbf2800b42a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ef022cb5ccd3757adda282dccca52b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bea8bf593f594c51fc7cc547482bee.png)
(1)求a,b;
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e463554e7d7d9b96aabe12f5436fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bda892497cea43df67db57b4e2a07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d5a5e70f64f0933ae1e4ddec5fa2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0db7eb2d7545d055f1cb6e8a7b5e1dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
7 . 已知幂函数
在
上是严格增函数,函数
,其中
.
(1)求
的值;
(2)记集合
,集合
,若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36b2b34bc4c530e7f2694105e6d2cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c4fb81c019473f1df0b32f24b23143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23e6083bfcf557ec745a068dd2d35a0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)记集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3de48f5f08aaf33e992c755c6ea2767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac0265e42f4b109ff874fa4e737efbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05d2be27e8f53e4de3071846dffb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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8 . 已知
为实数,设
.
(1)若
,求函数
,
的最小值;
(2)判断函数
,
的奇偶性,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c06c1345f122b7a62e5a0e3450e8438a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
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解题方法
9 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b0eb664357c9c340ca3c6a4edad3fb.png)
(1)若关于
的不等式
的解集为
,求实数
的值:
(2)若函数
在
上的最大值为2,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b0eb664357c9c340ca3c6a4edad3fb.png)
(1)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4036d58e17c78bd92203c33fbbf61696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3fd1e4a264b9c256df782129b4b312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b3afee040e9a88f0a9d6114a5b929e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1417a39c99b1e6b489c7c033a0625af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
10 . 已知函数
,
,若对任意的
,总存在
使得
成立,则实数
的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3af1f8fcad59a7d78a19a1bd5d8359a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c20e8232577b54c90072397fc1c21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b3a5b4f2b7279a7aa94f8ec12b3f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3afa9b6f5e9873bb4aa72b6473d3f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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