已知数列
的通项公式是
,其中
的部分图象如图所示,
为数列
的前
项和,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d238a52feae87b0778ba324dc144d50.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8eb1030bd703aece374489c4f87437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4202a39a3145d08df4d0d94f1144fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/0d238a52feae87b0778ba324dc144d50.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712318274748416/2749739969167360/STEM/c06d0294-0c79-4f07-bcee-e52604efdf9c.png?resizew=229)
2020·河北石家庄·模拟预测 查看更多[3]
河北省石家庄市藁城区第一中学2020届高三第二次强化训练数学(理)试题(已下线)专题16 数列-备战2022年高考数学学霸纠错(全国通用)黑龙江省七台河市勃利县高级中学2021-2022学年高三上学期期中考试数学(理)试题
更新时间:2021-06-24 09:03:11
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适中
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【推荐1】已知函数y=sin(
x+
)(
>0, -![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8536a5ebd76f494c03019086506d8e6a.png)
<
)的图象如图所示,则
=________________ .
![](https://img.xkw.com/dksih/QBM/2010/3/17/1569640999591936/1569641099280384/STEM/e21f55d8-1d8f-4c18-81fc-a48a2de67346.png?resizew=318)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8536a5ebd76f494c03019086506d8e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
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解题方法
【推荐2】函数
的部分图象如图所示,点
,
是最高点,点
是最低点,若
是直角三角形,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f52088329f5a1a488a6e3cc401451f.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6881261e684886b215582b7bdae8bb0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f52088329f5a1a488a6e3cc401451f.png)
![](https://img.xkw.com/dksih/QBM/2020/4/2/2432915469139968/2433395806560256/STEM/b0a631c62fe64b2dbed76c78204c5766.png?resizew=166)
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【推荐2】设数列
满足
,且对于任意自然数
都有
,又
,则数列
的前
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的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da18ad56af5e38b1a5b73f44ba198fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee7decc842785858be5763201c395b9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e75be7ff07d728d9c91c237e4c58f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2ad1fb42798995e4834ca8a57c8a30.png)
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