已知函数
.
(1)若
,求
;
(2)若
有两个零点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615927a03e7cf696e34b6f99157443bd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acdec23a0fe3994129069073ab8a412d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b056a90a2751f04ba5fff3dc5c1d0674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491cde3800b7cadb5fa6be3be1f233d3.png)
更新时间:2022-12-24 13:02:21
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解答题-问答题
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困难
(0.15)
名校
【推荐1】已知函数
.
(1)若函数
在
上是减函数,求实数
的取值范围;
(2)当
时,分别求函数
的最小值和
的最大值,并证明当
时,
成立;
(3)令
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有几个不同的零点并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e686f95aa48c41a0d64bcb24cc30f945.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98d225870c139808946d726257ba89f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fcad7338ba22445542a2acaccc4479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a46e143e9a57ebcbdf7228dc890e30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb18b373ead31437d7bd3b440d99a57a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d136ee210aec252579a4b2f160dc50fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a46e143e9a57ebcbdf7228dc890e30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9efdccfaec2428938a3720f877bce4.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05714966311e00dd2e0de1ec7d8a4ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d911d2ee489d9df52d862679bcb2c10.png)
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解题方法
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f259989400f67d3cf02420d28beca7ae.png)
(1)若
,函数
在区间
上是增函数,求实数
的取值范围;
(2)设
,若存在
使
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f259989400f67d3cf02420d28beca7ae.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/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e84dbb03e8c627ff11d5c7aeb0c8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2037b0bad7c7a312bac1ac0653d9a491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea2434ab54f085166dd070861add318.png)
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(0.15)
名校
【推荐1】已知函数
.
(1)若
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;
(2)讨论关于x的方程
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43dea74af12e4b8564bf08c74f8a37c0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc895959e9bc92294dc9dd2263dbf0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
(2)讨论关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a910ceddf453ba57ee7fa09652f1ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cf818dd484cc4cebd40a5f28eb8e9f.png)
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【推荐2】已知函数
,
为
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(ii)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbbe57bfd35428d8771f74fb7fc2f6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(1)求a的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268348e7e7431f24f2d1fbd6c67e4a56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8d1a34435611f6a59eac3dbfeb6e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261b70450bcaf41e573eb8fc1179bbd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852ae85cfcc804b3192ea8543c88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(i)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb601d00766e5da2ce348f06108b27fe.png)
(ii)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942a06b2fbcc2e50d17456ff551a2f4e.png)
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