题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072433-47416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072433-79760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072433-28075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072434-76216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072434-50391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072434-27767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072434-78341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072435-65908.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072435-33606.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072435-82906.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072435-72645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072435-95932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072436-91715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072436-12485.png)
由相似可知:
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072436-40606.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072435-33606.png)
【考点定位】考查对图形的认识,数列通项公式的求法,三角形相似等知识.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072400-68854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072400-89720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072400-87281.png)
A.20 | B.32 | C.80 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072348-13808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072348-71475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072348-65514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072348-13808.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072341-20416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072341-34400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072341-31478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191014/20191014072341-20416.png)
A.![]() | B.![]() | C.![]() | D.![]() |
A.![]() | B.- ![]() |
C.![]() | D.- ![]() |
最新试题
- 1When I was a kid in Minnesota, watermelons were expensive. O
- 2由与互为相反数,可以列出方程( ),它的解是=( )
- 3综合性学习。 每年的3月15日是“国际消费者权益日”。为了让同学了解“3.15”,学校学生会举办了“3·15进校园”的
- 4若变量满足约束条件则的最大值为________
- 5下列选项中属于文化生活中所讲的文化的是[ ]①黄冈中学举办校园科技文化艺术节②绚丽多彩的雨后彩虹③发射神舟八号飞
- 6周杰伦创作的“中国风”歌曲:“兰亭临帖,行书如行云流水。……忙不迭,千年碑易拓却难拓你的美……”。你唱到他的这首歌时会想
- 7实践是人类认识的来源和检验认识真理性的标准之一。[ ]
- 8如图,直角梯形ABCD中,AD∥BC,∠C=90°,BC=16,DC=12,AD=21,动点P从点D出发,沿射线DA以每
- 9下列大洲中,没有被赤道横穿过的应该是[ ]A、亚洲 B、欧洲 C、非洲 D、南美洲
- 10函数f(x)=ax3﹣3x2+x﹣1有极值的充要条件是[ ]A.a>3B.a≥3C.a<3D.a≤3
热门考点
- 1【题文】在直角坐标系中横纵坐标为整数的点称为“格点”,如果函数的图像恰好通过个格点,则称函数为k阶格点函数,下列函数中“
- 2已知椭圆中心在原点,焦点在x轴上,离心率e=,它与直线x+y+1=0交于P、Q两点,若OP⊥OQ,求椭圆方程。(O为原点
- 3Around 1850,a terrible disease ______the potato crop,and pot
- 4计算: .
- 5已知X+、Y2+、Z-、W2-四种离子均具有相同的电子层结构。下列关于X、Y、Z、W四种元素的描述,正确的是 (
- 6________ was it that made the singer ______ his Asia Tour C
- 7***说:“蒋介石两个拳头(指陕北和山东)这么一伸,他的胸膛就露出来了。所以,我们的战略就是要把这两个拳头紧紧握住,对准
- 8在相同条件下,分别将下列气体等体积混合于四支大小相同试管中:①NO与NO2;②NO与O2;③NO2与O2;④SO2与NO
- 9任务型阅读。A. The engine in your body. B. The location, size and
- 10已知4NH3(g)+5O2(g)=4NO(g)+6H2O(g)。若化学反应速率分别用ν(NH3)、 ν(O2)、 ν(N