已知
,函数
.
(1)若函数
在
上为减函数,求实数
的取值范围;
(2)令
,已知函数
,若对任意
,总存在
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848c33e3506416358d9f0d3ee66f67a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8592c22cbaefac9a1a25b0b45ed999.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5aaabe0fbbd9f4a5b29c4e7102279a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4822367cf6b85bc79f42c46290305c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde735ac36b8aafe180520c0ddfa66f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c74d2d712f7ebb90157fdc817d35f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146429fee754ceb9d0891f22ba648da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6458abe5da89eb011d6d01d179981050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
更新时间:2018-04-27 19:52:33
|
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解答题-问答题
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适中
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【推荐1】已知函数
在
上为增函数,在
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(1)求实数
的取值范围;
(2)求
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(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)求
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适中
(0.65)
【推荐2】已知
,函数
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(1)当
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(2)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
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(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
【推荐3】已知函数
.
(1)当
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的切线方程;
(2)若
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①在区间
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②在
上存在减区间;
③在区间
上存在极小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b503a06bf56582b24965759d225356ad.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88ea43f1e36cc084b861b7f5ea0c12.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9242dd26ba42e906d512542f02807779.png)
③在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574bdac28b1dcbf03f0fb903e8d0b49a.png)
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适中
(0.65)
解题方法
【推荐1】设函数
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(1)求函数
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16144e08de14faefee43018bbe58c19.png)
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适中
(0.65)
【推荐2】已知函数
.
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处的切线方程为
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,讨论函数
的单调性;
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,若至少存在一个
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb96c333e94634690fe37c45e2e33ef.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219ba6c8a1b54598db1a78cab28d9d30.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215c0236f5558c4b876e6e6d0add2210.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知向量
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(1)求
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解题方法
【推荐1】已知函数
,
.
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(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7d2bb9fd6de312a742ef10c81b9b1c.png)
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解题方法
【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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您最近一年使用:0次
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适中
(0.65)
名校
【推荐3】已知函数
(
).
(1)当
时,求
在
处的切线方程;
(2)讨论
在区间
上的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021525458031236c4d9b585c48ac2ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45895410f2b24085e0b2c0ef4e3972d7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(2)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779c078e850ff40330d7b3b98a402dd2.png)
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