先化简,再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/487f9c5ad3b72ea581808f66b08c2e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f3fa679bb55ded25a9b72a8e788cb1.png)
更新时间:2022-09-16 10:25:23
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】某校为了丰富学生的学习生活,利用课后辅导时间开设了很多学生喜欢的社团.其中网球社团正式开课之前打算采购网球拍
支,网球
筒
,经市场调查了解到某品牌网球拍定价
元
支,网球
元
筒.现有甲、乙两家体育用品商店有如下优惠方案:
甲商店:买一支网球拍送一筒网球;
乙商店:网球拍与网球均按
付款.
(1)请用含
的式子表示到甲商店购买需要支付______元,到乙商店购买需要支付______元;
(2)若
,请通过计算说明学校到甲、乙两家中的哪一家购买更优惠.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b72ac611ae66b86761e080761d9aabc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12a935a3f3704f8b36d23cb62af87e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06fc7811f9525e8b8c833746d6af5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.png)
甲商店:买一支网球拍送一筒网球;
乙商店:网球拍与网球均按
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c4bf61e073c899494b2fb3b767b108.png)
(1)请用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2acfbf5f2f0f3ecd9b7d80d77dada4a.png)
您最近一年使用:0次
解答题-计算题
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适中
(0.65)
【推荐1】计算下列各题.
(1)
.
(2)
.
(3)
.
(4)
.
(5)
.(用公式)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70f3fab39c9ceb9505115a5b6e54e5b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a612c317c00b88ec437d0931534968c5.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddeb5cb2185b140c9123c48a76546a2f.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c13e3a90ebb30bea9408f451c35cd66.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d13469578d2429f991285b761830550.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐1】按要求解答:
(1)计算:
;
(2)化简:
;
(3)解分式方程:
.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ba993f8b4adfad5f2d93fc51492bc2f.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc84ba37e14472294ab99b8d222eb33.png)
(3)解分式方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8256e325b0dcfe60657895e5d5c6af14.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐1】运用公式进行简便计算:
(1)1982;
(2)103×97.
(1)1982;
(2)103×97.
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】求值
(1)已知:
,
,求
及
的值;
(2)已知
的平方根是±3,
的立方根是2,将多项式
化简求值
(1)已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ae51b2db3b8cbb4258ad30ace8221b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a05bd40e529516380cfb5eb0e006307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ebc856291255f2d4a6c20b982a2442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7f468c1edd8644b6b92b110db617c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aab1c095e299d3cbbbb46f8d2e3bdb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6d31f474532ea9ada06536b3ac6523.png)
您最近一年使用:0次