代数式求值:
(1)求代数式
的值,其中
,
.
(2)已知
,
,且
,求
的值.
(1)求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516a791533ace002d69d374090793c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b27aee52676f4237adac068fe745fde.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1aaaea0449ea43cf2cd284441ecfbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ea1d5e5799d5d211f835a15b71260f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
更新时间:2023-11-04 14:59:56
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解答题-问答题
|
较易
(0.85)
【推荐1】长方形ABCD的长是a,宽是b,分别以A,C为圆心,长方形的宽为半径画弧,得到如图所示的图形.
![](https://img.xkw.com/dksih/QBM/2022/1/8/2897092741029888/2945898054082560/STEM/06020e25-124b-42ed-aca3-fe6ab82c3599.png?resizew=276)
(1)请你用代数式表示阴影部分的周长和面积(结果中保留
)
(2)当
,
时,求阴影部分的面积是多少?(
取3.14)
![](https://img.xkw.com/dksih/QBM/2022/1/8/2897092741029888/2945898054082560/STEM/06020e25-124b-42ed-aca3-fe6ab82c3599.png?resizew=276)
(1)请你用代数式表示阴影部分的周长和面积(结果中保留
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】(1)先化简再求值:
,其中
,
.
(2)若关于
、
的多项式
不含二次项,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e947a0a63adf1d054fcf8fc682c167.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e077a4a3dce66a6b80e69586a65132f3.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f6a82556e887ab6e18d25144550bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0877194ab8760f54c35527177b03ff93.png)
您最近一年使用:0次