已知a,b互为相反数,c,d互为倒数,x的绝对值是4,求
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69196eed446415a53bb1cc25201e95c1.png)
更新时间:2024-03-14 20:44:49
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【推荐1】已知a、b互为相反数,c、d互为倒数,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940eb9e378d7fad6c0760d90c4a480dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91c3920e2adeb20ede6220f8fad8fa01.png)
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【推荐1】已知a与b互为相反数,c与d互为倒数且x的绝对值是5,求x-4cd+2a+2b的值.
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【推荐2】已知
,它们之间有如下关系:
互为相反数,
互为倒数,
的绝对值为
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e714354916263c7210fbf3fa247d835b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2486ab32c52f7d7afc557af8bacf9527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb38a58dd9ecf73f112c90ccbf83048.png)
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【推荐1】图
是一个长为
,宽为
的长方形,沿图中虚线用剪刀均分成四块小长方形,然后按图
的方法拼成一个边长为
的正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/c3d01716-8b80-4ef2-9b59-d8137074d8d9.png?resizew=320)
(1)请用两种不同的方法求图
中阴影 部分的面积.
方法
: ;
方法
: .
(2)观察图
写出
,
,
三个代数式之间的等量关系: .
(3)根据(
)中你发现的等量关系,解决如下问题:若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad491e5b5e14c49ef8b7004ebcfcef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a024ba7034bd9d8ea94c5f1b7e5b7ea3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/c3d01716-8b80-4ef2-9b59-d8137074d8d9.png?resizew=320)
(1)请用两种不同的方法求图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
方法
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
方法
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(2)观察图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58cf9ababdff83b367721a8d2a4b393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa036015855e69735807708bb036b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
(3)根据(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4694e96079ee906902109e51a2a446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce22c046824b4e99ea143102567abe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a5c0816f87b3f0317adc60d3c0fbf2.png)
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