1 . 已知
,
,z是
的平方根,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d148b9a135230c040ba5b8b11d63df5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d90f3797d645f7eabe6b652efe0b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c74db99b027b90c1e2b79397b4d24dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1433c8103033c67232f2f9ae189608d.png)
您最近一年使用:0次
2 . 已知直线
与坐标轴围成的三角形的面积为4,则此直线的解析式为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.png)
您最近一年使用:0次
3 . 【阅读理解】
【材料一】
是无理数,而无理数是无限不循环小数,因此
的小数部分不可能全部写出来,但可用
来表示
的小数部分.因为
的整数部分是1,将这个数减去整数部分,差就是小数部分.由此得到一个真命题:
如果
,其中a是整数,且
,那么
,
.
【材料二】已知x,y是有理数,并且满足等式
,求x,y的值.
解:∵
,
∴
.
∴
且
,解得:
,
.
请解答:
(1)如果
,其中m是整数,且
,那么
______,
______;
(2)如果
的小数部分为a,
的整数部分为b,求
的值;
(3)已知x,y是有理数,并且满足等式
,求
的值.
【材料一】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34e01955f8c8fe2f0041b35d8d602a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9ec2b0b6702a5f37fe8a213193dac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e84dbb03e8c627ff11d5c7aeb0c8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a100443e47f3bd8ff48866627c5a7b.png)
【材料二】已知x,y是有理数,并且满足等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe00100e26241feb17cd1cb89eac8651.png)
解:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe00100e26241feb17cd1cb89eac8651.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585cc515121fe121df0224b16f310e57.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a341b2ea03c3a4f83fb27ff954d60c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/816d06ecd04291d5e52cc2c954382641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
请解答:
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723bf2951cdc7eda95fb063854c5c5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a7f63eed0d5e6cfdcb35483f09c3c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d83024443ba4361019cfb30537075e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04eae8fe19474b653c5543b20044dc9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989342e5735d28884e4e3607a77420ba.png)
(3)已知x,y是有理数,并且满足等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d53bfbee43ef84771d82fd5330484c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
您最近一年使用:0次
4 . 求下列各式中x的值.
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1277b945ddfed99d30510deda7fb04.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d873da7ff7ea1742c2229634b41b68b.png)
您最近一年使用:0次
5 . 小明在解方程
时采用了下面的方法:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0adf229806d0330abaa8d3eda88809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e116639ecdf10fc162892809fdfcf25d.png)
又有
,
可得
,
将这两式相加可得
,
将
两边平方可解得
,经检验
是原方程的解.
请你学习小明的方法,解下面的方程:
(1)解方程
;
(2)方程
的解是______(用含a、b的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e95857b9fcde7b45e59ef3d498e456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0adf229806d0330abaa8d3eda88809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e116639ecdf10fc162892809fdfcf25d.png)
又有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e95857b9fcde7b45e59ef3d498e456.png)
可得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f70738cc5d8a4c4bbcbae8063ade58.png)
将这两式相加可得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31412e1d1936a0017f8b394233df853d.png)
将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219e7aa832d6637d8cd51c1cb1ecf2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
请你学习小明的方法,解下面的方程:
(1)解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7877a63f8f1226fad96484e3ff185d79.png)
(2)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f001197a43688704c8b93a3f052c0d3.png)
您最近一年使用:0次
6 . 计算题:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7b1675b426a944c1711167dd823531.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d926e1e0c0cbc520e95aeafcd83a1b2e.png)
您最近一年使用:0次
7 . 解下列方程(组)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ce7b114e63595d3818b2d66bb2884b.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ce7b114e63595d3818b2d66bb2884b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff74463508d733e3d2a08ae0f350f0d.png)
您最近一年使用:0次
8 . 已知实数a的算术平方根是
,1的立方根是b,解关于x的方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a4105086b0cc6909e5b23e9cf0cc12.png)
您最近一年使用:0次
9 . (1)解方程:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9deaadcccaa7a1aaed4a9d78cf2c9fac.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35d56a61b973a187b7b751e2ffe8a84.png)
(2)解方程组:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8000a147023efcf34cd4c1bbed75fea.png)
②
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9deaadcccaa7a1aaed4a9d78cf2c9fac.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35d56a61b973a187b7b751e2ffe8a84.png)
(2)解方程组:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8000a147023efcf34cd4c1bbed75fea.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111758173aa56956a8d5c2b1505ff703.png)
您最近一年使用:0次
10 . 在一次活动课中,虹烨同学用一根绳子围成一个长宽之比为
,面积为
的长方形.
(1)求长方形的长和宽;
(2)她用另一根绳子围成一个正方形,且正方形的面积等于原来围成的长方形面积,她说:“围成的正方形的边长与原来长方形的宽之差大于
”,请你判断她的说法是否正确,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84783b6ba0f36789519816101a437f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42ac0659980f1b40c8390d804da47b.png)
(1)求长方形的长和宽;
(2)她用另一根绳子围成一个正方形,且正方形的面积等于原来围成的长方形面积,她说:“围成的正方形的边长与原来长方形的宽之差大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
您最近一年使用:0次