(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac79e5fd7360ff5cce5862deb77f5a3.png)
(2)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac79e5fd7360ff5cce5862deb77f5a3.png)
(2)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe65350f2d9cb0ae4b01a81d36be070.png)
更新时间:2023-09-22 22:58:20
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解答题-计算题
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真题
【推荐2】(1)计算:
;
(2)先化简,再求代数式
的值,其中x是不等式组
的整数解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3982de59aadd56d3fdd935ca57a2242f.png)
(2)先化简,再求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0baa246c6e261b6630600f7f5e0f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c715ab2f9d7f3f7291cbb2de9f726676.png)
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解答题-问答题
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适中
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名校
【推荐2】(1)解方程:
;
(2)阅读材料,并回答问题:
王佳在学习一元二次方程时,解方程
的过程如下:
解:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa09c9e2978a4e316f071aa04749eb0.png)
①
②
③
④
或
⑤
,
⑥
问题:
上述解答过程中,从________步开始出现了错误(填序号),发生错误的原因是________;
请写出这个方程正确的解________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6862fbbe5b8b6a136aab06e20282bf96.png)
(2)阅读材料,并回答问题:
王佳在学习一元二次方程时,解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa09c9e2978a4e316f071aa04749eb0.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa09c9e2978a4e316f071aa04749eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba413ac84cfe7847041544ecc4dbe86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874fe7211b5a6a03b45926a8c0491bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39aa910a1b28ad444c2ba7a023d5b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc547bab3a31a465a85488c03d50727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37dff4425ec70518dc40235dab463a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1d2b6c7eb30d8b8ce32c65b76105d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46bd36bcf1156d4a4c706ae08bbc745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3514471d228a947ad36b6fd209597e8e.png)
问题:
上述解答过程中,从________步开始出现了错误(填序号),发生错误的原因是________;
请写出这个方程正确的解________.
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐1】如图,点P1、P2、……Pn是反比例函数y=
在第一象限图像上,点A1、A2……An在x轴上,若△P1OA1、△P2A1A2……△PnAN-1AN均为等腰直角三角形,则:
![](https://img.xkw.com/dksih/QBM/2013/12/20/1573691135188992/1573691140931584/STEM/fa19c065d2734516afb54b7b1bf8f172.png?resizew=197)
(1)P1点的坐标为
(2)求点A2与点P2的坐标;
(3)直接写出点An与点Pn的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44938586368ddf88706de8a08d56e401.png)
![](https://img.xkw.com/dksih/QBM/2013/12/20/1573691135188992/1573691140931584/STEM/fa19c065d2734516afb54b7b1bf8f172.png?resizew=197)
(1)P1点的坐标为
(2)求点A2与点P2的坐标;
(3)直接写出点An与点Pn的坐标.
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解答题-问答题
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适中
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【推荐2】小明在解方程
时出现了错误,解答过程如下:
∵
,
,
,(第一步)
∴
(第二步)
∴
(第三步)
∴
,
(第四步)
(1)小明解答过程是从第______步开始出错的;
(2)写出此题正确的解答过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d53bc086105cc7fe1ac1864b4d09a77a.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f600cfe06ce3b664321868968371bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf9b4a0c45a830e90b3c469d3083c95.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ac885cf2b6806b4f3fe2430e240475.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e084d6fddaf4a411276257a60fb14c36.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e510b122eae7e23286d4eddffeb4bb51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e0cfe0b60d0d9b316bcf4da01e0f89.png)
(1)小明解答过程是从第______步开始出错的;
(2)写出此题正确的解答过程.
您最近一年使用:0次