已知函数
,且对
,
,都有
.
(1)求
的表达式;
(2)已知关于x的不等式
的解集为A,若
,求实数a的取值范围;
(3)已知数列
中,
,
,记
,且数列
的前n项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282e825c14110833c45ac9db52e5f42c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6593a700bf3e89107556454666b787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845ebe200c96e5259501ad8978ffae5f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6b1cfb0b2755e419ed28cbb4d0ece4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6397b02d758108ce97907d2efcac1d63.png)
(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2bc260323ce13981f2ee3fdfb52d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08ed7d51b6175cae1cbc40e8878e3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29877f249cacfa421cc082410a73e69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d35a29be4e48c56ee056c4b9cad8110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5737f1f9cad2471f3ca53241b25a1eb9.png)
更新时间:2018-01-05 16:58:12
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解答题-问答题
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适中
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解题方法
【推荐1】根据条件求下列各函数的解析式:
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(2)已知
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(3)若f(x)满足
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(1)已知f(x)是二次函数,若f(0)=0,f(x+1)=f(x)+x+1,求f(x).
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fbdfe67b409230d7d918d4b0a76917.png)
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适中
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【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02332ce61a2d74ffc7fcb05e24c175a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解答题-证明题
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适中
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【推荐1】已知数列
的各项均为正数,
为其前n项和,对于任意的
满足关系式
.
(1)求数列
的通项公式;
(2)设数列
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c86dd162cdcf371c5c160ae4b6971d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c215db1d8f69757118ad405b78035628.png)
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【推荐2】在①
,②
这两个条件中任选一个,补充在下面问题中并解答.
问题:已知数列
为递增数列且满足
,
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的前
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.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c734f347314f64b76e48ab0aeb8984b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb7cba4abad7d50257ada7d9f188d28.png)
问题:已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55d8d7bb99a601fe0d3b97b8e70579d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
注:如果选择多个条件分别解答,按第一个解答计分.
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【推荐1】已知不等式
的解集是
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的解集是
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8023e1902803a7939d2aa32ba9e2d44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33422dedd592fa9687d1ae7a53b3ca1a.png)
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解答题-问答题
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适中
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【推荐2】已知函数
,
.
(1)若
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,求函数
的零点;
(2)求不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800569992168807d991c59bd37c62736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
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【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382b48691a2355034d858ff12485bc07.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502c4ff1cd420b9da4de849e63c307e9.png)
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【推荐2】若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ebea9f1c0b1d659ba2db2ca704d1ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)求
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(2)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3047d4ab078dafc06c047bcbf0a6ffaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
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