题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080519-55899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080519-68215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080519-58232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080520-20285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080520-58188.png)
(1)求{
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080519-55899.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080520-28528.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080520-63525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080520-57144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080519-68215.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080521-78159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080521-26984.png)
解析
试题分析:(1)依题意有
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080521-76493.png)
由于
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080521-90060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080522-21175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080522-78097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080521-78159.png)
(2)由已知可得
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080522-75895.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080522-96554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080521-26984.png)
点评:基础题,本题利用方程观点,通过建立q的方程,求得q的值。(2)直接利用等比数列的求和公式,达到解题目的。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080512-57317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080512-93069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080512-57317.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080502-34927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080503-37867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080503-73403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080503-11117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080504-99535.png)
(Ⅰ)求出
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080504-87549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080503-11117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080502-34927.png)
(Ⅱ)若保持这9个数的位置不动,按照上述规律,补成一个n行n列的数表如下,试写出数表第n行第n列
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080504-28709.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080504-42948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080453-41915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080453-58035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080453-93193.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080453-52187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080454-33572.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080444-86055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080444-96800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080444-82117.png)
A.4 | B.2 | C.-2 | D.-4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080436-47726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080436-98681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080437-88079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080437-51526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014080437-90912.png)
A.16 B.27 C36 D.81
最新试题
- 1 赵壹字元叔,汉阳西县人也。体貌魁伟,身长九尺,美须豪眉,望之甚伟。而恃才倨傲,为乡党所摈,乃作《解摈》。光和元年,举
- 2 While we are developing agriculture and industry, we must p
- 3观点一有人说好,认为男女生要有界限。 观点二有人说不好,认为男女生都是同学,没有区别。 观点三有人说要具体分析,既要
- 4Whenever she saw the young man, she would feel her heart ___
- 5在学过第一学习主题《中华文明的起源》后,小明的班级举行了一次知识竞赛活动。请你也来一显身手吧!(1)人物闯关:请根据下列
- 6He insisted that he ____right, and so he insisted that his p
- 7如图人物是时代的楷模,他们身上体现了哪些共同的时代精神①艰苦创业 ②大公无私 ③全心全意为人民服务 ④追求民
- 8容积为2L的烧瓶,在压强为1.0×105Pa时,用塞子塞住,此时温度为27℃,当把它加热到127℃时,塞子被顶开了,稍过
- 9(本题满分8分)计算(1)(2)
- 10下列表示对应化学反应的离子方程式正确的是A.次氯酸钠溶液中加入双氧水有氧气放出:ClO—+ H2O2=O2↑+ Cl—+
热门考点
- 1请你阅读:星期天,小明一家三口去郊游。中午,爸爸带他去了一家野味餐馆。爸爸说:“这里有天鹅、熊掌、穿山甲,弄两斤尝尝怎么
- 2哈佛大学的校训是:“与柏拉图为友,与亚里士多德为友,更与真理为友。”对此认识不正确的是A.重视传统,尤其以柏拉图.亚里士
- 3要形成一个好的班集体,其可靠的保证是[ ]A.同学间的相互尊重B.纯朴、融洽的同学关系C.同学们的主人翁意识D.
- 4一个多边形的内角和等于它的外角和的3倍,它是______边形.
- 5蛋白质结构域[ ]A.都有特定的功能B.为折叠的较为紧密的区域C.属于三级结构D.存在每一种蛋白质中E.属于二级
- 6函数y=3x与y=1x在第一象限内的交点坐标为( )A.(-1,1)B.(1,-1)C.(0,0)D.(1,1)
- 7如图已知AB是的切线,切点为交于点过点作交于点小题1:求证:;小题2:若的半径为4,求CD的长;小题3:求阴影部分的面积
- 8已知抛物线C:y2=8x,直线y=2x+b与抛物线C相交于A,B两点,且|AB|=15,求b的值.
- 9如图,是由一些大小相同的小正方体组合成的简单几何体. (1)图中有 _________ 块小正方体; (2)请分别画出它
- 10设f(x)=lg2+x2-x,则f(x2)+f(2x)的定义域为______.