如图,在长方形
中,
点
在
上,点
在
上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ffef8f5227b7ce02a621a3dd636f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3b16deac78a5e072f25fd5252f5532.png)
,且
.
(1)用两种不同的方法表示出长方形
的面积
,并探求
之间的等量关系(需要化简);
(2)请运用(1)中得到的结论,当
时 ,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9186e4574ffe28e673724fcb019db208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f63f1d68117b4c457447f82131f269e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ffef8f5227b7ce02a621a3dd636f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3b16deac78a5e072f25fd5252f5532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86bb0fcbd411836a49f55dac147f239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4dc4d7d30af1cdce660795e0fd7d7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/0745d58e-fe5d-43f9-aa4a-dc519d6d92cd.png?resizew=216)
(1)用两种不同的方法表示出长方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9186e4574ffe28e673724fcb019db208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
(2)请运用(1)中得到的结论,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f51cc2a5098ac898f5969306357fc90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
更新时间:2020-11-24 06:56:43
|
相似题推荐
解答题-计算题
|
适中
(0.65)
【推荐2】(1)计算:(x2+2x+3)(2x﹣5);
(2)因式分解:a4﹣1;
(3)先化简,再求值:[(x﹣2y)2+(x﹣2y)(x+2y)﹣2x(2x﹣y)]÷2x,其中x=1,y=﹣2
(2)因式分解:a4﹣1;
(3)先化简,再求值:[(x﹣2y)2+(x﹣2y)(x+2y)﹣2x(2x﹣y)]÷2x,其中x=1,y=﹣2
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】(1)计算:(3xy2)2·2xy÷6x3y3;
(2)运用整式乘法公式进行简便运算:2021×2019+20202;
(3)先化简,再求值:2b2+(a+b)(a-b)-(a-b)2,其中a=-3,b=
.
(2)运用整式乘法公式进行简便运算:2021×2019+20202;
(3)先化简,再求值:2b2+(a+b)(a-b)-(a-b)2,其中a=-3,b=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】[发现]两个正整数之和与这两个正整数之差的平方差一定是4的倍数.
[验证]
______;
[证明]设两个正整数为
,
,请验证“发现”中的结论正确;
[拓展]已知
,
,求
的值.
[验证]
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30695831915d2cfcba5c09400e659af1.png)
[证明]设两个正整数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
[拓展]已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0814ae0f801ed1d13d15c54e5f7753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93259e5023ff61c4e0fc3286a46af90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc5f85f56005d1828a804d397e129db.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】解关于x、y的二元一次方程组:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcbfb4605f0a62a6a66ee49d0bed533.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcbfb4605f0a62a6a66ee49d0bed533.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc66e25f74a71a4b5669d5994821082.png)
您最近一年使用:0次