已知
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9024a13b10ce907de18653e36b48b479.png)
(1)用含a、b的式子表示A
(2)若
,求A的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e34c24f9f63ce93e15e11021e022d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9024a13b10ce907de18653e36b48b479.png)
(1)用含a、b的式子表示A
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c09ac33fb7280b40518400f3dd810e.png)
更新时间:2021-12-21 18:42:40
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,一截钢管外半径是
,内半径是
,高为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/23f528a9-3247-498c-b816-6d15e2c67754.png?resizew=156)
(1)用含有R,r,a的代数式表示钢管的体积;
(2)若
,
,
,求钢管的体积(
取3.14,结果保留整数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae196996ab19c015e7f4eb8ba09982e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104e109ddc148a3a656dcfc272d31a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18703d241f6fe0a0dedcc815603322fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/23f528a9-3247-498c-b816-6d15e2c67754.png?resizew=156)
(1)用含有R,r,a的代数式表示钢管的体积;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c04cf1526b75a516ef1a578bdd4c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b34de7fa6bfe13823ebaad0ad515db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2302f08a4b2f2bed333a6732ca64bc89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】如图是一个长方体纸盒的平面展开图,已知纸盒中相对两个面上的数互为相反数.
(1)填空:a=______,b=______,c=______.
(2)先化简,再求值:-a2b+2(3ab2-a2b)-3(2ab2-a2b)+abc
(1)填空:a=______,b=______,c=______.
(2)先化简,再求值:-a2b+2(3ab2-a2b)-3(2ab2-a2b)+abc
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/a9ef233e-02cc-47ef-a0cb-252684c8e4b3.png?resizew=141)
您最近一年使用:0次