已知函数
.
(1)讨论函数
的单调性;
(2)已知
,若存在
时,不等式
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab1483cec4365ab97d91969b7c39b7d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be362dec96173f246ff747264007817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3368388525e30cb7179909b03184eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02f7dc246453995d576e4266fd6e258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
2022·安徽淮南·一模 查看更多[4]
安徽省淮南市2022届高三上学期一模理科数学试题四川省成都市青白江区2022-2023学年高三上学期"零点五诊"文科数学试题四川省成都市青白江区2022-2023学年高三上学期"零点五诊"理科数学试题(已下线)第七章 导数与不等式能成立(有解)问题 专题三 单变量不等式能成立(有解)之同构法 微点1 单变量不等式能成立(有解)之同构法
更新时间:2022-02-06 14:02:24
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解答题-问答题
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解题方法
【推荐1】已知函数
.
(1)若
,试求函数
的单调区间和最值;
(2)设
,
,证明:对任意的
,恒有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a09453fdd05a2d055a9c35ac899d391.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc895959e9bc92294dc9dd2263dbf0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86aada6c0797463dd75408a0ad45c43e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e07a024c9ae1e811ea066430c02fd62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0de23b9f2df01c336026ee4031627d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c1fc04955cbe17bc9357c0f1d83405.png)
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3978cac5e5e87fc84536e06bdf7226bc.png)
(1)当
时,求函数
的单调递增区间;
(2)设
(
,
),
(
,
)为函数
图像上相异两点,若直线
的斜率
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3978cac5e5e87fc84536e06bdf7226bc.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50eca09b66237488f8b9d9ed9737c406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】设函数f(x)=xsinx+cosx-
ax2.
(1)当a=
时,讨论f(x)在(-π,π)上的单调性;
(2)当a
时,证明:f(x)有且仅有两个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
(1)当a=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
(2)当a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7901da1956e7ec90f27a42cbdc86b9.png)
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解题方法
【推荐1】已知函数
在
处有极值10.
(1)求实数
,
的值;
(2)若方程
在区间
内有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef8f04abf56a115bf73c0dc0b8420d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c0d827ef8598ba6b70b34b2bdcd1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa66623cf54b42d6d12be4c8edaa7071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
【推荐2】已知函数
,其中
为常数,
为自然对数的底数.
(1)当
时,求
的单调区间;
(2)若
在区间
上的最大值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ca55282ddfde68479fe3c07f1cfe18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c8d82b0a97f17f6fbd0587cdfc984e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】设函数
,其导函数为
.
(1)求函数
的单调区间;
(2)若
,
为整数,且当
时,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1327d912b8f14a16aefe5d244a419623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1327d912b8f14a16aefe5d244a419623.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9c1d83e687e18832b3e21d65516a91a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
【推荐2】已知函数
,若
在点
处的切线方程为
.
(1)求
的解析式;
(2)求
在
上的单调区间和最值;
(3)若存在实数
,使函数
在
上为单调减函数,求实数n的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c9aa97f223ed033fdd2f6b36749a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3907da01aa2971e05262ecf58bafe27d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807ef849c96ac942acbdda44a52814b0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9d745e0292ce5b5ec94a65aae3dae6.png)
(3)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc64bcb77cfc251b3fbac48f3936782d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af1b26f832498bb8c1467824a3988bd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8bf6d46e7224ad74eb6d1ffa04fcaa.png)
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