1 . 已知函数f(x)=x2lnx.
(1)求f(x)的单调区间;
(2)证明:
.
(1)求f(x)的单调区间;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ec20a5cbf05d92a8a51d56dd886135.png)
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2019-03-28更新
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2卷引用:【市级联考】贵州省黔东南州2019届高三下学期第一次模拟考试数学(文)试题
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2 . 定义:如果函数
的导函数为
,在区间
上存在
,
使得
,
,则称
为区间
上的“双中值函数“
已知函数
是
上的“双中值函数“,则实数m的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2437d40a85a950a06b1824312ddfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eb7f0759565b9d36008d49b627583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040135d64192de075ba0cc9f11ddbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe47997f78ae446cfb2896078363d905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/573439e006be202bfb4e5c17d1b1db64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3dc1fd02d378a333465caa0375a30cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eb7f0759565b9d36008d49b627583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7595947ea0fca8895824f547aff1799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422f50cbfa9dafb8fafeadd8a5f81aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知函数
.
(1)求函数
的单调区间;
(2)若
恒成立,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd57411123af7327d9be39c4065b358.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c8abdaf1a883ca6d2fed14f8341696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2018-12-05更新
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3968次组卷
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7卷引用:贵州省凯里市第一中学2019-2020学年高三上学期开学考试数学(理)试题
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4 . 已知函数
.
(1)当
时,求函数
的单调区间;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415114a419c2e18239a51d47a8ebde0a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7bf74e4eb8ca4fa2829e4576e4023f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b15c5557add0fefe6adb90ea625668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52f51cacddca9a3f755829559c1bf3c.png)
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5 . 已知函数
.
(1)试讨论函数
的单调性;
(2)对
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a2138873bd0912131277fcc50604f6.png)
(1)试讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
(2)对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e94ec54544d42e2d0856ac3cb6f7cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed0d3e6741e0193addff8cf7b25019c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3c1bc1bef74975fc7706df1bb17a27.png)
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6 . 已知函数
.
(1)试讨论函数
的单调性;
(2)对
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8160543902f16704412b6cc37705b87.png)
(1)试讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce77771964981e26991baedd2a8c200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f9b7ef7b53169c74c58b723da57abda.png)
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7 . 已知:定义在
上的可导函数
的图象关于点
对称的充要条件是导函数
的图象关于直线
对称.若函数
,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed49de6c44f108e9734e0ea1ed82e4fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7994bbcf39f4dda34e877b21af71f103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe1bb27e8c12f3120a7c69ad34cc89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e607442aa6e88d4f872311822b50567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0b0df282c85599c5f4dc7f69bfbeb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
A.1 | B.2 | C.3 | D.6 |
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8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a954639d86801baaeb33802b1d333a4b.png)
(Ⅰ)若
,求曲线
在点
处的切线方程;
(Ⅱ)若
在
上恒成立,求实数
的取值范围;
(Ⅲ)若数列
的前
项和
,
,求证:数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a954639d86801baaeb33802b1d333a4b.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829ac3e8758bcf4510604c0021c6e8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c85da54867a6c35bcf558aa103781221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8bc42bcdbfb400d62a63c10cd699d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8754a5d7608dd46faa44a51f1861830.png)
您最近一年使用:0次
2018-04-05更新
|
1051次组卷
|
5卷引用:贵州省凯里市第一中学2018届高三下学期《黄金卷》第二套模拟考试数学(理)试题
名校
解题方法
9 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acb7a9a20f1742372235700600c7862.png)
(Ⅰ)当
时,求函数
的单调递减区间;
(Ⅱ)若
时,关于
的不等式
恒成立,求实数
的取值范围;
(Ⅲ)若数列
满足
,
,记
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acb7a9a20f1742372235700600c7862.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca4be345087f993a4078e16c16608e2.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42740d8f095b5f7825d14c4c312096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b0933a5e3b755d257e5d7216b77c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f644ac3aaf5a4d9e4f6f551e54dfbbd.png)
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2018-04-05更新
|
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3卷引用:贵州省凯里市第一中学2018届高三下学期《黄金卷》第二套模拟考试数学(文)试题
10 . 函数
,(
为常数).
(1)求函数
的单调区间;
(2)当
时,函数
有零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e726bcc8e54db85fba3c8e5ee2ad5574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e79c390bc46dbc27e1c7b003d812a9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3e26cabd311303c96e9055e0346966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e79c390bc46dbc27e1c7b003d812a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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