![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7f2fd37569017626e46ebbe3d50a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3aa2af5c9fcacc3390ed958c90487f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944b3d73af9b9d7b6b81ec08f7b3bc0b.png)
更新时间:2018-08-14 22:03:54
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】【阅读材料】
小慧同学数学写作片段
乘法公式“大家族”
学习《整式的乘法及因式分解》之后,我发现乘法公式不只是教材上“黑体字”明确的“平方差公式
”“完全平方公式
和
”,其实在教材或平时的练习中还“隐含”一些“乘法公式”值得积累,比如,
;
;
;
.
……
【解题运用】
(1)在实数范围内因式分解:
___________;
(2)设
满足等式
,求
的值;
(3)若正数
满足等式
,求代数式
的值.
小慧同学数学写作片段
乘法公式“大家族”
学习《整式的乘法及因式分解》之后,我发现乘法公式不只是教材上“黑体字”明确的“平方差公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c956a491d2d80aba6e5cae4b888e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d351a97edcc0783d8d7a02d041bdb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194c8e87fbce2ab6bae776f4631414fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fda4d2266c1a834b20c46b9f21f016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08e89d6e430af9e9c3300653e31158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6855d15476c12ecce039f53b59c174bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23610cad743b8d7ed8227ad666a82c2d.png)
……
【解题运用】
(1)在实数范围内因式分解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99a40e6d18711a144ba14445af2bf34.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d02cf484b9de4cf51b4e9caf2b019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9bf36c742a731147a309ebf0eb372.png)
(3)若正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdea56a8bf4f5b714999b71e0baf426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0975f2ca73a4d340a3e6b43c71ee9d4e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】定义:关于
,
的二元一次方程
(其中
)中的常数项
与未知数系数
,
之一互换,得到的方程叫“交换系数方程”,例如:
的交换系数方程为
或
.
(1)方程
与它的“交换系数方程”组成的方程组的解为 ;
(2)已知关于
,
的二元一次方程
的系数满足
,且
与它的“交换系数方程”组成的方程组的解恰好是关于
,
的二元一次方程
的一个解,求代数式
的值;
(3)已知整数
,
,
满足条件
,并且
是关于
,
的二元一次方程
的“交换系数方程”求
的值.
![](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/16fe8d6ceb1175bdbf6936ff67fa2990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef159a0ff640ec13f0e331416cf504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](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/16fe8d6ceb1175bdbf6936ff67fa2990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2d0636d512fa767b3f8ab59ce0824c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae08dd8713ddc5b5e1c832b2219d0b0.png)
(1)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a583c33f73d57a5fde5f13b9908bb0.png)
(2)已知关于
![](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/16fe8d6ceb1175bdbf6936ff67fa2990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fe8d6ceb1175bdbf6936ff67fa2990.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/763e36fc7d07b0542f9b5d8253b5bcf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2ca9205fe61b3aab7c40ca92304158.png)
(3)已知整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f04ce5c412c2e23523af4258fc8ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074ebfd96995278ddb9afe5db227f583.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/66898ddcd0e4a23fa10fdda62131d421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】一个各数位数字均不为零的四位自然数M,它的后两位数为
,前两位数为
,若
为整数,则这个数M为“孪生数”.
例如:
,∵
,
,
,∴
是“孪生数”.
又如:
,∵
,
,
,∴
不是“孪生数”.
(1)判断2430,2781是否是“孪生数”,并说明理由;
(2)四位数M是“孪生数”,它的千位数字为
,百位数字为
,记
,
.当
,
均是整数时,求出所有满足条件的M.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0be44077d42cfffece905b1af13e000.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bc996f7d1d22074ab21b6848177a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3fd28f3d41bcf8085253c4f5066c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aadc4f26938f7a9d55006ab4d3c1e102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117bced61f9cc2822941112257ad2250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f6b32df708632583c71cd6f5d2c690.png)
又如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b65f762ac56a45e84c2497676d7222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1497f0eeb7590de2bfffe9cac35f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce38714985fe2245cdeacb23e197eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bee73a0d63827bf2381989db45691f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cac1e32bbefde0d0d35bbe31e87f45.png)
(1)判断2430,2781是否是“孪生数”,并说明理由;
(2)四位数M是“孪生数”,它的千位数字为
![](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/6d9f369eb442c07aa636cc848c1fae9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561787ff78367e171899af41c4a936d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86a7f68370511906270d4508d45cb36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c274a229d6f58264ddea723c334758.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,
中,
,
,过点
作
交
于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714570245496832/2718609783095296/STEM/3ad51f38-2da7-4c32-bf9c-0ecb7c2ba43d.png)
(1)求证:
;
(2)设
.
①以
为半径的
交
边于另一点
,点
为
边上一点,且
,连接
,求
;
②点
是线段
上一动点(不与
、
重合),连接
,在点
运动过程中,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284a563413dc0532138fb2a64db8cc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5440ddfe35b460dfb6b6be04df1ed40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714570245496832/2718609783095296/STEM/3ad51f38-2da7-4c32-bf9c-0ecb7c2ba43d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb9433204bb447085b177ca8ba1c9f8.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9b29f02b493e55038527a487711aa7.png)
①以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b38ab9282ec460b20e7d783cb73f24c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f9e2d85fba67ecf3c89181981d8bb8.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c915bba3b518bb74e26946a0d30e6e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】二次函数图像
与y轴交于点C,
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894363887288320/2973403706449920/STEM/b0386626-0ce7-4886-81cb-715de9b5b0e2.png?resizew=359)
(1)如图,若二次函数图象与x轴交于点A,
,
①求二次函数的表达式;
②点P为第二象限内抛物线上一点,连接BP、AC,交于点Q,令
,请判断:是否有最大值?如有,请求出有最大值时点P的坐标;如没有,请说明理由.
(2)若二次函数的顶点为M,连接MC,令MC与y轴的夹角为
,当
时,直接写出m的取值范围______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb9fb4704333eeba0fd18fbf0cd7155.png)
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894363887288320/2973403706449920/STEM/b0386626-0ce7-4886-81cb-715de9b5b0e2.png?resizew=359)
(1)如图,若二次函数图象与x轴交于点A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
①求二次函数的表达式;
②点P为第二象限内抛物线上一点,连接BP、AC,交于点Q,令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61aba00db310f00fe5259c228685c74e.png)
(2)若二次函数的顶点为M,连接MC,令MC与y轴的夹角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3e611f8ef38860274329d6e6544ab5.png)
您最近一年使用:0次