1 . 设等差数列
的前
项和为
,
,则![](https://img.xkw.com/dksih/QBM/2016/5/10/1572629506252800/1572629511380992/STEM/7c328e2fc3654fac9ec9bb188c3855de.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572629506252800/1572629511380992/STEM/87d66ce139684f02915bd0a4eb0f3639.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572629506252800/1572629511380992/STEM/07599be97e5d48cdb4f5a5b855cc01fe.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572629506252800/1572629511380992/STEM/614b42d8ae4c4d33985e34fb1e25f598.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572629506252800/1572629511380992/STEM/a7d94f8d45af439d952f1e07fcc89cd8.png)
![](https://img.xkw.com/dksih/QBM/2016/5/10/1572629506252800/1572629511380992/STEM/7c328e2fc3654fac9ec9bb188c3855de.png)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
2 . 椭圆
左右焦点分别为
为椭圆
上任一点且
最大值取值范围是
,其中
,则椭圆离心率
取值范围( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f055e86704a06aec743b5e23e54440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45657dbe2e696d2986a8f79f7c734bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ce220c9f82e1d4f735967593ad408f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f572ff2025a6385673c4c3faa1713d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae76c22d2635d539fdd7cff8fcd9f5bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-05-10更新
|
847次组卷
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4卷引用:2016届青海省平安一中高三4月月考理科数学试卷
2016届青海省平安一中高三4月月考理科数学试卷2017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷12017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷2(已下线)《2018届优生-百日闯关系列》数学专题四 专题四第六关