1 . 若
,则
的最小值等于_____ .
![](https://img.xkw.com/dksih/QBM/2016/10/20/1573085501874176/1573085508034560/STEM/f7cf5a706bd24269b2d8b6e7620ce059.png?resizew=79)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0946479c941fbedaec12db71df4db991.png)
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2 . 已知命题:“在等差数列
中,若
,则
为定值”为真命题,由于印刷问题,括号处的数模糊不清,可推得括号内的数为____________ .
![](https://img.xkw.com/dksih/QBM/2015/4/20/1572076968943616/1572076974817280/STEM/978a83b9d5ba403da760118c126796f2.png?resizew=31)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e213cace1d3c95c237688d8f2526f2cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b87df689b605e7a283b56d454c3736a0.png)
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2015-04-20更新
|
456次组卷
|
3卷引用:2015-2016学年广东中山一中高二上第二次段考数学卷
3 . 在
中,
面积为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c13fadefec9d4bad9149b6d5cd3e0e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c58e203bc5f4869659dfc74ef2e7ec0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c13fadefec9d4bad9149b6d5cd3e0e.png)
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2016-12-02更新
|
1339次组卷
|
4卷引用:广东省韶关市高中数学2016-2017学年高二上学期期中理数试题
14-15高三上·内蒙古·期中
4 . 数列
的通项公式是
,若前
项和为
,则项数
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def6057e4e040be6d2172bf6d341171f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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5 . 已知等差数列
的前n项和为
,若
,
,则![](https://img.xkw.com/dksih/QBM/2016/5/18/1572637359661056/1572637365805056/STEM/bc66309c2969411b9694ca786e87e997.png?resizew=79)
_______ ![](https://img.xkw.com/dksih/QBM/2016/5/18/1572637359661056/1572637365805056/STEM/f3982c6945084054bed8af8070f28464.png?resizew=48)
_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://img.xkw.com/dksih/QBM/2016/5/18/1572637359661056/1572637365805056/STEM/cc485c76c63b47cc83f1b90456866613.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2016/5/18/1572637359661056/1572637365805056/STEM/68126a329030472e98871f1889abb8bb.png?resizew=151)
![](https://img.xkw.com/dksih/QBM/2016/5/18/1572637359661056/1572637365805056/STEM/05b1e426ada6463b99af09885d6b5dd0.png?resizew=189)
![](https://img.xkw.com/dksih/QBM/2016/5/18/1572637359661056/1572637365805056/STEM/bc66309c2969411b9694ca786e87e997.png?resizew=79)
![](https://img.xkw.com/dksih/QBM/2016/5/18/1572637359661056/1572637365805056/STEM/f3982c6945084054bed8af8070f28464.png?resizew=48)
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6 . 在等比数列
中,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2803cba8d834dd8af69ef19e6954fd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
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7 . 设数列
的前
项和为
, 若
,
N
, 则数列
的前
项和为________ .
![](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/c0bbb67593c95bab93ff67145ae95ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52223b89a6d01df1de9d329a8145acea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81a57cae6fe8a6542f2b56ff5e0c9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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解题方法
8 . 记不等式组
所表示的平面区域为
,若直线
与
有公共点,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3cd9aa3a00d20ba7fe32f31d33977a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b82c7fc649b5851712800b86ad4459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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9 . 已知
的面积为
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41db498f025052df2dbb1e50ab672675.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d11a5a756d8fdd7b294c4f5fd63467b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41db498f025052df2dbb1e50ab672675.png)
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10 . 如图在
中,
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572586691633152/1572586697621504/STEM/4963136aa1b744ff8e400308dddd1a6b.png?resizew=308)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572586691633152/1572586697621504/STEM/345f364c53754a2fa34d32195dcb8ed1.png?resizew=202)
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