已知函数
,
.
(1)若函数
在定义域内单调递增,求实数
的取值范围;
(2)证明:方程
有且只有一个实数根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038bcbe5c9898f245cca99b629cf43a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec5bce37c9f6932972a7dd3d084a3f6.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c13a09123ae873e0b0501aaecc507e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b331bbdd68d110681fc4547748b93bb.png)
(2)证明:方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59d918416313e2f8529252dd4ab3dee.png)
2019高三·全国·专题练习 查看更多[1]
(已下线)《2018-2019学年同步单元双基双测AB卷》【文科数学B】第二章第二练函数图像的应用及函数与方程
更新时间:2018-10-23 09:24:08
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be25ceff83114bb00d097766ac688808.png)
(1)若函数
在区间
上为增函数,求
的取值范围;
(2)求
的单调区间;
(3)当
且
时,不等式
在
上恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be25ceff83114bb00d097766ac688808.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d2f7cf8b2952f5de03a32af45831cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bacc7818d190d3a67a7ffe4d48d7fc5.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99074f989e74d5ff306b4b7b7a379c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf171ded47ca6f0346409a1fe1019f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6330540758a21f46fc7a6d1e6328d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d3c9b0d99ccf9bf448cb28c7214d8a.png)
(1)若
,求
在![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105835ef2db90df2f3b32d39ba243905.png)
上的最大值
;
(2)若
在区间[1,2]上为减函数,求a的取值范围;
(3)若直线
为函数
的图象的一条切线,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d3c9b0d99ccf9bf448cb28c7214d8a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105835ef2db90df2f3b32d39ba243905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bcaceadc00d891e292c8bdff9e4ce64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6552c3a42c2629ef9533f0fc651736.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐3】已知
.
(1)若函数
在区间
内单调递增,求实数
的取值范围;
(2)若
在区间
上存在单调递增区间,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ca67f565d1a791ae0f44d1ca5d8e0c.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知函数
(
).
(1)若
,证明:当
时,
;
(2)讨论方程
的实数解的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce9c45fee6e42e80a19721f10f04673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc534f86d1e1388a66f67ec075e86cc.png)
(2)讨论方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a5dac1cd77539390db9889a58514bb.png)
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【推荐2】已知函数
,
,且函数
在
和
处都取得极值.
(1)求实数
与
的值;
(2)对任意
,方程
存在三个实数根,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae06c488100e31570805778b1d322e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e347b2b13e28b090ba15607492546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e347b2b13e28b090ba15607492546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb2c1a1109bf3c1f53f55b14131397c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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【推荐3】已知函数
,
,其中
是自然对数的底数.
(1)证明:函数
在区间
上有零点;
(2)求方程
的根的个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7b8c79d961cc35abcb9a0cfae7102a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204b474f7b8b3a5020e241eba104855b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2beb22b735da7cb8054dd722450632f5.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779b28641c18eacbceca96d4e4ad9710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/972cfd3677c0f6342a57d3ab58cf0356.png)
(2)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e94a24d2872ec1205de9f381a849178.png)
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