1 . 求下列各式中的x:
(1)
;
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7bae8a81d6f8136c5ed273d3f52f1a.png)
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37331855b933cb31d33e70831265e945.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7bae8a81d6f8136c5ed273d3f52f1a.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6c6fa9f56e7327881441808e8867a0.png)
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名校
2 . 求下列各式中x的值:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a21e624189b38d45409ad8f6e83b3a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a51d660b0d0a1c090911368a4e3f86.png)
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2022-05-01更新
|
188次组卷
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2卷引用:新疆维吾尔自治区乌鲁木齐市第六十八中学2020-2021学年七年级下学期期中数学试题
3 . 解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7900ec8cca799219c67b43014fdf75e.png)
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2022-04-20更新
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335次组卷
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2卷引用:广东省珠海市香洲区凤凰中学2020-2021学年七年级下学期期中数学试题
4 . 解方程
(1)(x+3)3+27=0;
(2)25(x+2)
=36.
(1)(x+3)3+27=0;
(2)25(x+2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ef5abce73648e3834140df9a72aa8.png)
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2022-04-17更新
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173次组卷
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2卷引用:河南省洛阳市伊滨区2020-2021学年七年级下学期期中数学试题
5 . 求x的值:
(1)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af761aa56362366a2e5815a9a055c03.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0012a231d49b9ed1e7a89880642ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af761aa56362366a2e5815a9a055c03.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325b790af89e4c77887cf770c07640c0.png)
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2022-04-14更新
|
255次组卷
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2卷引用:新疆维吾尔自治区乌鲁木齐市第七十中学2020-2021学年七年级下学期期中数学试题
6 . 求下列各式中的x.
(1)x2﹣9=0.
(2)
(x-1)3=1
(1)x2﹣9=0.
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c921b2ca2d7e54227cd8e069391a1a5.png)
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7 . 若一个正数
的两个平方根分别是
和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7f468c1edd8644b6b92b110db617c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1850890bae5db5babc7664c0cc8a8328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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8 . (1)计算下列各式的值:
①
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbc9a84f16a94b0ca5db78cba26b356.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7dd29c8475aad8b23a04eefb65f48b.png)
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761e8ed248f09c74226e5ad9382cea3.png)
(2)求下列各式中
的值:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e030d977917125e5825830903fdefc.png)
②
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28cd93f24b0b21aa0b94aebf6831e5b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbc9a84f16a94b0ca5db78cba26b356.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7dd29c8475aad8b23a04eefb65f48b.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761e8ed248f09c74226e5ad9382cea3.png)
(2)求下列各式中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e030d977917125e5825830903fdefc.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2304a0af97496f07c2361b3fa8272535.png)
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9 . 先阅读下列一段文字,再解答问题.
已知在平面内有两点P1(
),P2(
),其两点间的距离公式为P1P2=
,同时,当两点所在的直线在坐标轴上或平行于坐标轴或垂直于坐标轴时,两点间距离公式可简化为
或
.
(1)已知点P(2,4),Q(-3,-8),试求P、Q两点间的距离;
(2)已知点M(m,5),N(0,2)且MN=5,求m的值;
(3)求代数式
的最小值.
已知在平面内有两点P1(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf2102b730fe50c8681f1a6fafe67af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c788875fe76212a7c59d0a9cee345d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd910af5916a5bec4ccef547dec704c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84582197ed0d1963e42fb03a0fa14158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d774e4b00d12342ef869c610fa55e98a.png)
(1)已知点P(2,4),Q(-3,-8),试求P、Q两点间的距离;
(2)已知点M(m,5),N(0,2)且MN=5,求m的值;
(3)求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7060d8082650c782765c182548e2a488.png)
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10 . 根据平方根的意义知:若
,则
,此时可求出方程
的两个根,依此理,由
,则
,移项得
,这是方程
的两个根.根据上述提示,解下列方程:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5dae02a9bd22a0af088c793eb4417c2.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96558c1c0716b7cfb092937320edda43.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569fe90ac92aa823b2fee1c502649ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561a649e09819f8a9f7fc6e4972efa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569fe90ac92aa823b2fee1c502649ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea613fb59023f1ac81ef4ee020e8744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa5ad7667782aca079ece1f357ef589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317b6894cb4f49e9bee5f35d9aee3ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea613fb59023f1ac81ef4ee020e8744.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5dae02a9bd22a0af088c793eb4417c2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96558c1c0716b7cfb092937320edda43.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5deef6c2eac9f0622d50fcdfa5e9a1b0.png)
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