某同学把
错抄为
,若正确答案是
,错抄后的答案为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60a967a8aa7946f917687e728cb34e2.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2a26699edc2688398d3e97d1951127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28560a3eb70062f83ba0ce3876254438.png)
![](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/f60a967a8aa7946f917687e728cb34e2.png)
更新时间:2018-11-14 21:36:22
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适中
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【推荐1】已知
,
.
(1)当
,
时,
的值为__________ ;
(2)若无论
取何值时,
总成立,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3008cdf44ab43740f79df32e92768eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a73fd1588c47bd3b5e57cd90d997ce9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ddeddf42507ae9341feb019bb5be33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9129759975eeb05e46fac849ce954a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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填空题
|
适中
(0.65)
【推荐2】已知表示有理数a、b、c的点在数轴上的位置如图所示,则化简|a|-|a+b|+|c-b|+|a+c|=______ .
![](https://img.xkw.com/dksih/QBM/2021/8/27/2795125457969152/2797429964382208/STEM/3bd99240d76d46d78677c852a8bcbc75.png?resizew=218)
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