名校
1 . 已知数列
、
满足
,
,
,
.
(Ⅰ)求证:
;
(Ⅱ)设数列
的前
项和为
,求证:
;
(Ⅲ)设数列
的前
项和为
,求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6d8a8a57db1c2fc7f465d2cfd2aa78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71406c902e2bfb15f5b84ea419611e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5530b78617f9a9976adc605a71fe0d48.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e970038ed20d95a45c228ee5572861.png)
(Ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0441e285d990afd18061376145503267.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/b704bf47e74f620c582874c58d9f0993.png)
(Ⅲ)设数列
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e468312d09c6563c9094b710a35a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91b2a778937512218c0cb49ea728eb1.png)
您最近一年使用:0次
名校
2 . 在
中,若
,
,
,斜边
上的高为
,则有结论
,运用类比方法,若三棱锥的三条侧棱两两个互相垂直且长度分别为
,
,
,三棱锥的直角顶点到底面的高为
,则有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060d1cfa345a83186e3d63fa10a57645.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7845fd89477ecc808e5519317fff78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5140a040d36ee7c59400f94f74c68b38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df81cda12d7601d58b1d9c7c180c4d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228ea9dd1d190f91ca46752ef6a6d921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060d1cfa345a83186e3d63fa10a57645.png)
您最近一年使用:0次
2018-12-14更新
|
1024次组卷
|
2卷引用:【校级联考】浙江省浙东北(ZDB)教学联盟2018-2019学年高二上学期期中考试数学试卷