1 .
求下列各式的极限值:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0726317777f22b30d1693721f7b581cb.png)
; (2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a846f2e889db4ec8f214fbd122d5356.png)
.
2016-11-30更新
|
1301次组卷
|
1卷引用:2010年河北省石家庄市第一中学高二第二学期期中考试试题(理科)(已下线)2010年河北省石家庄市第一中学高二第二学期期中考试试题(理科)
2 . 已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b1f1f2881451fdf9f90f657b927d16.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
为常数),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
项和,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ea5fe1a6a4aab745741bf97f513218.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307f89291689cc9c5d531b43cbcf3309.png)
的等差中项.
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14877bf6d7297f02feff3468abf01f69.png)
;
(Ⅱ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
的通项公式;
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b933d363f5b85a6b4110c9ef030c56a.png)
且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
为数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
项和,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20bfac5056220b98b65676601fa4948e.png)
的值.
2016-11-30更新
|
486次组卷
|
1卷引用:2010年河北省石家庄一中高二下学期期中考试数学(理)(已下线)2010年河北省石家庄一中高二下学期期中考试数学(理)