设
是偶函数,当
时,
.
(1)当
时,方程
有4个不同的根,求m的取值范围;
(2)若方程
有4个不同的根,且这4个根成等差数列,试探求a与m满足的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a3b596c2664df42a0dadd1fb8e18cb.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb2e46f49adba6036e2624639a1b966.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb2e46f49adba6036e2624639a1b966.png)
更新时间:2020-11-30 20:38:07
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名校
【推荐1】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)
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解题方法
【推荐2】已知
是二次函数,其两个零点分别为-3、1,且
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(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e64110e70076812fb5b5bda4d75fdb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c28d8e0f586aeb60dc1ecc983d81246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb708adff55a5bda517c3f570f06584c.png)
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解题方法
【推荐1】定义在
上的函数
满足
且
.当
时,
.
(1)求
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上有实数解,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ab20883d799aaf311371393fa7d7c.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541289ea62d1da7f0a232f3d21faee9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304226ca50149b49702928e44d565964.png)
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【推荐2】设函数
.
(1)求函数
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解集为(
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(1)求函数
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【推荐1】已知函数
.
(1)判断函数
的奇偶性并证明;
(2)若方程
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2095e0ae1814ec8adce10e65d534b0d0.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a2ecd4ee71932cb6dd8200fd37c519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐2】已知函数
.
若函数
,求
在
上的最小值;
Ⅱ
记函数
,若函数
在
上有两个零点
,
,求实数a的取值范围,并证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db9f47375c92971b4ec51560aa83062.png)
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【推荐3】已知函数
其中e表示自然对数的底数.
(1)若g(x)=m有零点,求m的取值范围;
(2)确定t的取值范围,使得g(x)-f(x)=0有两个相异实根.
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572389638201344/1572389644435456/STEM/a7e02ab479434f51bac158c88f456c1f.png)
(1)若g(x)=m有零点,求m的取值范围;
(2)确定t的取值范围,使得g(x)-f(x)=0有两个相异实根.
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