在平行四边形
中,动点
在对角线
上运动时,恒有
,其中
是数列
中的项,且
,则数列
的通项公式为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a825fd559c6ec00fc4b1c65105c75b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a75c503d42b96cdfb390f2d544b0e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
21-22高三上·山东聊城·期中 查看更多[2]
更新时间:2021-11-27 16:19:46
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填空题-单空题
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适中
(0.65)
【推荐1】如图,将数列
中的所有项按每一行比上一行多两项的规则排成数表,已知表中的第一列
、
、
、
构成一个公比为2的等比数列,从第2行起,每一行都是一个公差为
的等差数列,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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【推荐2】已知等比数列{an}为递增数列,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9565c7d7bdd0bba5a3ffc8fdf4df7fe8.png)
您最近一年使用:0次
【推荐1】已知数列
满足:
,设
,
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045e4d6ebd7f891ca14758af887c5b90.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03aa2a3fafc45173184e2fbd83c05b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee1d480f5061015cb0232f975eafdef.png)
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解题方法
【推荐2】设数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa36c6f0bda099f69a18671da5184793.png)
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解题方法
【推荐1】如图,在梯形
中,
,点
是
的中点,点
在线段
上,若
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f864244952b60f3648f08a19268efae9.png)
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【推荐2】如图,在
中,
,
,
为
上一点,且满足
,则
的值为________ ;若
的面积为
,
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d11a5a756d8fdd7b294c4f5fd63467b.png)
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