1 . 二次函数
的部分对应值如下表:
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618142720/STEM/166ee7b426084ed19ca83d0f25274fcb.png?resizew=503)
则关于
的不等式
的解集为_______ .
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618142720/STEM/2643e03fe549452ba26d79a70803b6dd.png?resizew=164)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618142720/STEM/166ee7b426084ed19ca83d0f25274fcb.png?resizew=503)
则关于
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618142720/STEM/0bc93591dcf24778ae049be6e83aa95c.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618142720/STEM/e9e0da0d1a7a4934a98a21c96f142f7b.png?resizew=59)
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2 . 在
和
之间插入
个实数,使它们与这两个数组成等差比数列,则这个等差比数列的公差是____ .
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618118144/STEM/d9c06e0d251140d8bf0ddb28148898dd.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618118144/STEM/4a8422168155462eb1e82ca150c82460.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618118144/STEM/2d559012c1954ae491063f87a192f733.png?resizew=12)
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3 . 已知数列
满足
,
是数列
的前
项的和.
(1)若数列
为等差数列.
①求数列的通项
;
②若数列
满足
,数列
满足
,试比较数列
前
项和
与
前
项和
的大小;
(2)若对任意
恒成立,求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/24add758a9764279aeea07c3decefe80.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/19c28992f3924667a6a124f399390593.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/77df37f2a378447989b85b26b8752a60.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/24add758a9764279aeea07c3decefe80.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/1cb06e2ae7b94ef48a87d07cd82a8606.png)
(1)若数列
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/24add758a9764279aeea07c3decefe80.png)
①求数列的通项
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/c0810fa3e34441b5ad4cdd1834bdf921.png)
②若数列
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/8bebc2761f9f492687187a93c6c7d517.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/574d647416344f56b2f8ea8f252e5f88.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/d7e99ebcbb2e40a6b49d7b7047010030.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/8433b08b4ef74c2c9b61426795d5b072.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/8bebc2761f9f492687187a93c6c7d517.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/1cb06e2ae7b94ef48a87d07cd82a8606.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/b178e91e537c445d9aa3f69fa5c74c7e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/d7e99ebcbb2e40a6b49d7b7047010030.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/1cb06e2ae7b94ef48a87d07cd82a8606.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/f9068224af674149b402a02a826644bc.png)
(2)若对任意
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/5252bbddec034dcd97f8fee47e82fd72.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618576896/STEM/85c4586e7043440683b7aaa0e83a034c.png)
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解题方法
4 . 已知数列
中,
,其前
项和
满足
,其中
.
(1)求证:数列
为等差数列,并求其通项公式;
(2)设
,
为数列
的前
项和.
①求
的表达式;
②求使
的
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96788ec9d72877deefaf295cebce145f.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/635069baf0fcffb3173225965edb3654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683f65f4666669ddb1c6d646506efd4f.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fcf7d1f7aa169e06e626f54ca44af0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
②求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77eb3b4f1b6e3c609a5b29790902cad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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5 . 不等式
的解集为______ .
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618060800/STEM/b3e5cc62b2bb416b98e21196f8daa649.png?resizew=36)
您最近一年使用:0次
解题方法
6 . 设等差数列
的前
项和为
,已知
.
(1)求数列
的通项公式及前
项和
的表达式;
(2)当
为何值时,
最大,并求
的最大值.
![](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/32df258592f4481e3c7b449fb1d37dfb.png)
(1)求数列
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)当
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
解题方法
7 . 已知函数
.
(1)当
时,
恒成立,求实数
的取值范围;
(2)是否存在整数
,使得关于
的不等式
的解集为
?若存在,求出
的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/9808debfdd8949f8b9affc5b1e2bb88e.png)
(1)当
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/c405dd013ef146adbe2250445589afb6.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/3f171322fc1447bf8809bab5ebea8a8a.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/44cb047ab8a4404baed53c4a552f375d.png)
(2)是否存在整数
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/589d690b4a1c4b32aa1d71b18eca830e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/a0633e2141a0403cbfac295c4ca8a778.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/c9f888d0762544c0a62505aeac8d3d05.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/387f257cf7a847daa5f9c42c27783741.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/fb2222668bd447b5babbc7dd8d09d1e1.png)
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8 . 解关于
的不等式
为常数).
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618437632/STEM/14b4d559040b4e7182db4da63a44f645.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618437632/STEM/06c694f509b64b9294beb450d4f8fb69.png)
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9 . 已知两个等差数列
,
,它们的前
项和分别是
,若
,则![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618265600/STEM/9555b564a95e4f22985deedf3924338c.png?resizew=35)
___ .
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618265600/STEM/165fd6dcb68246eabc8d93a3ecdd0db4.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618265600/STEM/1ebc9a0fbf374510b72696f485cbfe8d.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618265600/STEM/e13b39921ecf44d6b175748aca4f8ca4.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618265600/STEM/c58c4d07ea724182abb43c88d058e474.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618265600/STEM/62d257c3f7474615be17778d07304b8b.png?resizew=80)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618265600/STEM/9555b564a95e4f22985deedf3924338c.png?resizew=35)
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10 . 设实数
满足
则
的取值范围是_____ .
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618208256/STEM/dc6d50108efe464f81e92c27290d3bfb.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618208256/STEM/655e638b690f40adb7b585913ece949b.png?resizew=103)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618208256/STEM/ae4d383201fa4b84b9cf526ad4ec0f96.png?resizew=60)
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