先阅读下面的内容,再解决问题.
例题:若
,求m和n的值.
解:因为
,
所以
,
所以
,
所以
,
,
所以
,
.
问题:
(1)若
,求
和
的值;
(2)已知
,
,
是等腰
的三边长,且
,
满足
,求
的周长.
例题:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df0242b1f8d32c7f2381f471b986f69.png)
解:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df0242b1f8d32c7f2381f471b986f69.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf8ce4817f2a6b7a83904e2f3ec1562.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa8d3a3ba6e168ec087d32bce2d895a.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7568123c098b83d3afd8f8f0fc81b1de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c641d33e9984be279e7db5ee90ef41a3.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eeae3d0886ea80770248bf577737c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6862dd3c43647ce7d7935a7d205b54d2.png)
问题:
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ec7ec0cdfd94544417ebc2736e3454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)已知
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.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/71b6ff9652408b48232e4d9605e62ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
更新时间:2023-08-23 12:08:12
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】分解因式:
,以上分解因式的方法称为分组分解法,对于四项多项式的分组,可以是“二、二分组(如此例)”,也可以是“三、一(或一、三)分组”,根据以上阅读材料解决问题:
【跟着学】分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2cefd7ba2c47133bf2b96a25dabbd61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce9a7c2e8cb32f217178766d5ee4868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab07369b42c55f1a1fd3987e1c964c9.png)
=______.
【我也可以】分解因式:
.
【拓展训练】已知
,
,
为
的三边长,若
,试判断
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963bf254876935377b92917896d64f05.png)
【跟着学】分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2cefd7ba2c47133bf2b96a25dabbd61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce9a7c2e8cb32f217178766d5ee4868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab07369b42c55f1a1fd3987e1c964c9.png)
=______.
【我也可以】分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a484ad33ff74dcd6058de9601aaa5174.png)
【拓展训练】已知
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dea410525348294c53857af5b336448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】已知x+y=3,(x+3)(y+3)=20.
(1)直接写出xy的值;
(2)求x2+y2+4xy的值;
(3)直接写出求x﹣y的值.
(1)直接写出xy的值;
(2)求x2+y2+4xy的值;
(3)直接写出求x﹣y的值.
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【推荐2】(1)分解因式
;
(2)解不等式组:
.
(3)解分式方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d7f024fbbacc76f765c2427bb7a91d.png)
(2)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb48e20538e0d026946c5c73079f564a.png)
(3)解分式方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4debd7798566727a68042b538941ee17.png)
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【推荐1】综合与探究
如图,在平面直角坐标系中,直线
与
轴,
轴分别交于点
,
,与直线
交于点
.
(1)求点
的坐标;
(2)根据图像,直接写出不等式
的解集;
(3)若点
为坐标平面内任意一点,试探究:是否存在点
,使
是以
为腰的等腰直角三角形?若存在,请直接写出点
的坐标;若不存在,请说明理由.
如图,在平面直角坐标系中,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622cc155db066bd3c5eaf2e1cbfab151.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a05352934810ceaa503c8ce97c9c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/87fc442f-888c-4d42-97cd-3d223e73ea35.png?resizew=191)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)根据图像,直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86b0da538701c08fb214608e062372.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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【推荐2】如图,
是
的弦,点
在过点
的
的切线上,且
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/cde154de-5f8e-456f-a7aa-1ae8eecc418d.jpg?resizew=129)
(1)判断
的形状,并说明理由;
(2)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a68215a94c076daafdb28ab8d1d04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/cde154de-5f8e-456f-a7aa-1ae8eecc418d.jpg?resizew=129)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5066be87970a6de7e8a5f8c36ed7df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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