已知三角形的三边长分别为
,化简
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba1e7a657ed134e68efd159b606620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5168de84fe67c91387d9a537430f4eea.png)
更新时间:2024-03-30 05:57:27
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解答题-问答题
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【推荐1】若不等式组
的解集是
.
(1)求代数式
的值;
(2)若a,b,c为某三角形的三边长,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f0dbc5e20d842d41627cf59c53e66e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
(1)求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929947f1766406638134c6d19b6209fe.png)
(2)若a,b,c为某三角形的三边长,试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f984bda161d80d2f88d0dd3df55438.png)
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【推荐2】先阅读材料,再回答问题:
因为一个非负数的绝对值等于它本身,负数的绝对值等于它的相反数,所以,当
时
,如
,
;当
时,
,如
,
.根据以上信息完成下列问题:
(1)
________;
________;
(2)
________;
(3)计算:
因为一个非负数的绝对值等于它本身,负数的绝对值等于它的相反数,所以,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496a1c409b974774f46f3ea6fa69cb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38025ab70b7875d5d615a3a931eb8b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2d861be4b778bd085b6e53c25ec509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5f421939ee855f25927e7570d82c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/653a7d2cba5c557c6fec515533a73999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692a23c5a5bd7564bce60775cba8821a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b975e732512d6fd337fa40cd16f97582.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8321672d78c9a65dd593412efd21c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13abfcc320990b33ccefe6a375c351f7.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c643402989274707517c4a906d637180.png)
(3)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c65ce1042622fe3679e1b8185f4199.png)
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【推荐1】已知
,
,
在数轴上的位置如图所示,问:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/8a7c9549-e8c5-496e-9b7a-69c8ee76fea0.png?resizew=213)
(1)若
,
,
,则
______.
(2)化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/8a7c9549-e8c5-496e-9b7a-69c8ee76fea0.png?resizew=213)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702a9a384ccb9937fecaa38b4f8c6c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbb2d9e082462c06c281dd00cedbbcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec1ac842afb28ac63b420b87e8b793b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b13a6a38781c8aba177581c809b7067.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960c65d072d5519019b7d690273e8254.png)
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【推荐1】已知a,b,c是
的三边.
(1)化简
;
(2)若a和b满足方程组
,且c为偶数,求这个三角形的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ffc687d6fb02529fc5dbe9c0c29028.png)
(2)若a和b满足方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77ed7cbe6862c2ec4abf9f82d72986d.png)
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【推荐2】已知一个等腰三角形的周长是18
,其中一边长是4
,求这个三角形的边长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
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