题目
题型:不详难度:来源:
如图所示,将矩形
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085723-62360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-42599.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-37398.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-70036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-84019.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085725-37235.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085725-85858.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-70036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085725-25447.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085725-68390.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085725-61393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085726-41206.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085726-64812.gif)
(1). (2分)试比较
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085726-60798.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085726-58187.gif)
2)令
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-16682.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-63584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-63584.gif)
3在(2)的条件下,若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-61324.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-42599.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-52010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-71660.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-25401.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-99664.gif)
(4).在(3)的条件下,若抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-44392.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-96648.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-82711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-70036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-89055.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-82711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-12359.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-89055.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-20316.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-85249.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-98406.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-58516.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-68897.jpg)
(1). (2分)试比较
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085726-60798.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085726-58187.gif)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-60766.gif)
由折叠知:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085731-91116.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085731-96295.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085731-30803.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085731-75135.gif)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-60766.gif)
(2). (1分)令
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-16682.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-63584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-63584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-63584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085732-33531.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085732-16661.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085732-90582.gif)
(3).在(2)的条件下,若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-61324.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-42599.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-52010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-71660.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-25401.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-99664.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085732-91922.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085732-68055.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-52010.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085733-31789.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085733-56735.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085733-28853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085733-79977.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085734-63417.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085734-82437.gif)
作
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085734-41301.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085734-15427.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085734-54097.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085735-56703.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085735-15092.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085735-88489.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085735-53352.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085736-87803.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085727-71660.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085736-77544.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085736-55711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085736-98120.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085736-62793.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085737-54117.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085737-56637.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085737-31691.gif)
(4).在(3)的条件下,若抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-44392.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085728-96648.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-82711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085724-70036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-89055.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-82711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-12359.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-89055.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-20316.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-85249.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-98406.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-58516.gif)
由(3):
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085737-14884.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085738-47753.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085738-27987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085738-35687.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085738-22889.gif)
方法1:若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085739-51519.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-20316.gif)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085739-42349.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085739-13472.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085739-43441.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085739-10404.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085740-35261.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085740-90176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085740-29257.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085740-15239.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085739-10404.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085741-53594.gif)
故直线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-85249.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-98406.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085730-58516.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085741-11694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085741-46541.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085741-59022.gif)
方法2:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085741-55792.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-20316.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085742-93244.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085742-64115.gif)
过
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085729-82711.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085742-44281.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085742-46596.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085743-51918.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085743-21825.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085743-92308.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085743-50039.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085744-74619.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085744-46426.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085744-96676.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085743-21825.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085744-96311.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085745-51310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085745-44429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085745-24298.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085745-76998.gif)
解析
核心考点
试题【 如图所示,将矩形沿折叠,使点恰好落在上处,以为边作正方形,延长至,使,再以、为边作矩形.(1). (2分)试比较、的大小,并说明理由.2)令,请问是否为定值?】;主要考察你对二次函数定义等知识点的理解。[详细]
举一反三
如图,抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085714-37405.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085714-25657.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085714-14244.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085714-96216.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085714-41401.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-11351.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-66505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-93810.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-26673.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-72994.gif)
(1). (3分) 用含
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-17713.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-66505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-56654.gif)
)
(2). (3分)连结
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-23360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-23360.gif)
(3). (4分)点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-53096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-53096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-53096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-23360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-66505.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085715-53096.gif)
)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085702-58464.png)
A (3,-5) B (-3,5) C(3,5) D (-3,-5)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085654-77475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085655-66252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085655-90319.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019085651-96046.png)
A(1,3) B(1,0) C(-1,3) D(-1,0)
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- 4(1)(4分)如图所示是一列沿x轴负方向传播的简谐横波在t = 0时刻的波形图,已知波的传播速度v = 2m/s,则x
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