已知a,b,c均为实数,且
,求方程
的根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eaf41c6ffbab08e10712d66577d2704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
更新时间:2021-11-25 10:13:35
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相似题推荐
解答题-应用题
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适中
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名校
【推荐1】如图1,已知点
在以
为原点的数轴上表示的数分别为
,且
满足
,动点
从点
出发沿射线
运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/475e7eb8-fff5-44b8-bec0-81d2c61e7bd9.png?resizew=266)
(1)点
表示的数是______,点
表示的数是______;
(2)若
分别是
的中点,在点
运动过程中,线段
的长度是否发生变化?若变化,请说明理由;若不变,求出线段
的长度;
(3)如图2,当点
运动到点
时,线段
绕点
以
的速度顺时针旋转一周.在此过程中,当线段
开始旋转时,动点
也同时从点
出发,以2个单位长度
的速度沿射线
运动.请直接判断:在线段
旋转过程中,点
与点
能相遇吗?若不能,试改变点
的运动速度,使点
与点
能够相遇,并求出点
的速度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e34891263e4825c821ba3a214d8503.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/475e7eb8-fff5-44b8-bec0-81d2c61e7bd9.png?resizew=266)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac7459c32105c4b28698ea77de49a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6498f9ed55156ee6cd10e35e6a4276e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/9ae15de9-25e7-4cd4-a7e7-34fb8f88a84c.png?resizew=239)
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解答题-问答题
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适中
(0.65)
【推荐2】我们约定:若关于
的一次函数
和
同时满足
,
,则称函数
和
互为“真诚函数”.根据该约定,解答下列问题:
(1)若关于
的一次函数
和
互为“真诚函数”,求
,
的值;
(2)若关于
的一次函数
的“真诚函数”经过点
,且与
的交点P在第三象限,求
的取值范围;
(3)在平面直角坐标系中,点
,点
,若关于
的一次函数
与它的“真诚函数”交于点N,在平面内是否存在点M,使得以A、B、M、N为顶点的四边形为菱形.若存在,求出M点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c32bdabb0e3b9f223fcfe4dfaea7741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff753b5f813cb7ff8f9a2b4f4d992a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7ae1f000e7c40405feafbb2fdde5eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303f9047e39136ee03bfe3a069b3e7b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(1)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82f1e7504ce8fe154c9bb488b0ba2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe23a081886ea0db414ee21917300fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94dbbe758200956846041f91c91c6af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)在平面直角坐标系中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75f347ef55e81904178c68f819a2516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6486c10ec324649f8100b63829fbbf3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
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解答题-证明题
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【推荐1】如图,∠BAD=∠CAE=
,AB=AD,AE=AC,AF⊥CB,垂足为F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/3e74df1d-a6ff-45bb-a93d-aa782c0bedae.png?resizew=264)
(1)求证:△ABC≌△ADE;
(2)求∠FAE的度数;
(3)若DE=a,CD=b,并且
,求DB的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/3e74df1d-a6ff-45bb-a93d-aa782c0bedae.png?resizew=264)
(1)求证:△ABC≌△ADE;
(2)求∠FAE的度数;
(3)若DE=a,CD=b,并且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f2cd82ad5d5a1123eeec4a24c1ed1.png)
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【推荐2】已知:实数a,b满足
.
(1)可得
___________,
___________;
(2)若一个正实数m的两个平方根分别是
和
,求x和m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ca3bb2e4f2fc0d4ea25eae54b137ce.png)
(1)可得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)若一个正实数m的两个平方根分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e00450073bf8a3791de21415d7e5a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d60b54c288710d2ed2b22abd947a04.png)
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解答题-问答题
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名校
【推荐2】解方程:
(1)x2+4x﹣2=0;
(2)3x(x﹣1)=2﹣2x.
(1)x2+4x﹣2=0;
(2)3x(x﹣1)=2﹣2x.
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