已知:在平面直角坐标系中,直线MN与x轴、y轴交于A、B两点,点A(-6,0)、点B(0,4),点C(m,n)是直线AB上且不与A、B两点重合的动点.
(1) 求△AOB的面积
(2) 如图1,点D、点E分别是线段OB、x轴正半轴上的动点,过E作EF∥AB,连接DE.若∠ABO=x°,请探究∠BDE与∠DEF之间的数量关系.(可用含x的式子表达,并说明理由)
(3) 若2S△BOC≥3S△AOC,请求出m的取值范围
(1) 求△AOB的面积
(2) 如图1,点D、点E分别是线段OB、x轴正半轴上的动点,过E作EF∥AB,连接DE.若∠ABO=x°,请探究∠BDE与∠DEF之间的数量关系.(可用含x的式子表达,并说明理由)
(3) 若2S△BOC≥3S△AOC,请求出m的取值范围
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/cbba4db5-b2ed-46bd-b612-4862a71f141e.png?resizew=380)
更新时间:2021-10-28 16:33:31
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【推荐1】如图所示,在平面直角坐标系
中,点A,
,
的坐标为
,
,
,其中
,
,
满足
,
.
(1)求
,
,
的值;
(2)若
在
轴上,且
,求
点坐标;
(3)如果在第二象限内有一点
,
在什么取值范围时,
的面积不大于
的面积?求出在符合条件下,
面积最大值时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4a90cfdbfa05577b6ec0b22739e7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabe33b24e9cabf7a5530bc75d37da2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f00fdb0b1dfb21a2e192990b79be37.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f81c1e91ae24e4af740798f1eaea29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc3b5adde543bdd99d10f0b8e32a346.png)
(1)求
![](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)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b778d2f43e5531a611c7550821846e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)如果在第二象限内有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26178e9ecc496514c4a3d8ab8cb04fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754059361280000/2788665471655936/STEM/75ed19bb-7524-4396-a8d1-65ae0786b6f2.png)
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【推荐2】我们知道,
表示数轴上数
所对应的点与原点的距离,
表示数轴上数
对应的点与数
对应的点之间的距离.请据此解决以下问题:
(1)若方程
有解,求
的取值范围;
(2)求
的最小值;
(3)若不等式
有且只有100个整数解,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc51e97939a8966daa015535a801561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a25d8f9593923203536dc9264f7060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a18f269e37ff500828d0ade4ea2ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec70b8434c7807282cb0c57391a86082.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba9364bb99e1ed7035fd2f6df1fc677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐3】在数学学习过程中,自学是一种非常重要的学习方式,通过自学不仅可以获得新知,而且可以培养和锻炼我们的思维品质.请你通过自学解答下面的问题:解决含有绝对值符号的问题,通常根据绝对值符号里所含式子的正负性,去掉绝对值符号,转化为不含绝对值符号的问题再解答.例如:解不等式
.解:①当
,即
时,原式化为:
,解得
,此时,不等式
的解集为
;②当
,即
时,原式化为:
,解得
,此时,不等式
的解集为
;综上可知,原不等式的解集为
或
.
(1)请用以上方法解不等式关于
的不等式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95eb2b65178ec50f36e62c155ba1d039.png)
(2)已知关于
、
的二元一次方程组
的解满足
,其中
是正整数,求
值;
(3)已知关于
、
的方程组
满足方程组的未知数x的值为整数,系数
也为整数且
.求满足条件的
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2130fa2cb3e73bead93f60095fbe5452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d845417b3ad97837a7dc04fea8d900f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed742ecf1cbc482a4d7b87e2b05003c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e77510be521b8fe16f83d865908077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b23dc58407f071b8fb308a52b2ee05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2130fa2cb3e73bead93f60095fbe5452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b23dc58407f071b8fb308a52b2ee05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4275aba27a3d538febd974f608adc8b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5221e6ab623c4a5fc3cf6ce1a40d2f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c323ba2324e60de59a73b0c8e0b3b2bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748418a963bdd8e32da4bab4e4abb7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2130fa2cb3e73bead93f60095fbe5452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748418a963bdd8e32da4bab4e4abb7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b23dc58407f071b8fb308a52b2ee05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748418a963bdd8e32da4bab4e4abb7ba.png)
(1)请用以上方法解不等式关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95eb2b65178ec50f36e62c155ba1d039.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/501433ff3dd9f85fdc0d11baab71dbc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d10d88acb70d05170a5ef55c46ec1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)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/c5d3c367f52a1fe19af02b54c15a6810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b3dc94900d737ad9de6653208f9782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】对于平面直角坐标系
中的图形M和点P(点P在M内部或M上),给出如下定义:
如果图形M上存在点Q,使得
,那么称点P为图形M的和谐点.
已知点
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466152363139072/2466969163358208/STEM/71cc5af3-c51c-4f43-8d43-f86939c30280.png?resizew=496)
(1)在点
,
,
中,矩形
的和谐点是_________________;
(2)如果直线
上存在矩形
的和谐点P,求出点P的横坐标t的取值范围;
(3)如果直线
上存在矩形
的和谐点E,F,使得线段
上的所有点(含端点)都是矩形
的和谐点,且
,求出b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
如果图形M上存在点Q,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caaba0d6f62b6b9cd64bb97714e05031.png)
已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b4315630139326aff4ffc04c765d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982cf316c2d7fdf49a81b428ab38e9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6314d6f44c7d35b2b4b5cdc041d344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a4ba61e0fe0cb463581292835301f8.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466152363139072/2466969163358208/STEM/71cc5af3-c51c-4f43-8d43-f86939c30280.png?resizew=496)
(1)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3925389e5ff8e9292c0ef2a62fe1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa23a3a8e235e9b941349310d35cc4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b389fa344132a624f4f66d7d2bbb467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1783f73b23411b09a8f11f8e967c75ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87490be8d0cdb7bc6c39d1a37f3bc335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79840623b47142ca13a167a60321491a.png)
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【推荐2】如图,在平面直角坐标系中,直线y=﹣x+2与y轴,x轴分别交于点A、B,动点P在线段AB上移动(点P不与点A、点B重合),以点P为顶点作∠OPQ=45°交x轴于点Q.
(1)点A的坐标为 ,点B的坐标为 ;
(2)求证:∠AOP=∠BPQ;
(3)是否存在点P,使得△OPQ是等腰三角形?若存在,请直接写出点P的坐标;若不存在,请说明理由;
(4)若点O到直线PQ的距离是
,请直接写出线段AP的长.
(1)点A的坐标为 ,点B的坐标为 ;
(2)求证:∠AOP=∠BPQ;
(3)是否存在点P,使得△OPQ是等腰三角形?若存在,请直接写出点P的坐标;若不存在,请说明理由;
(4)若点O到直线PQ的距离是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854506944552960/2855228053209088/STEM/9052a56f-7dac-4d26-a81b-9a1f60aef767.png)
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【推荐1】如图,
,点
、
分别在直线
、
上,点
在直线
、
之间,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/9ad367f6-5933-4e8b-9622-d74043692a90.png?resizew=559)
(1)求
的值;
(2)如图2,直线
交
、
的角平分线分别于点
、
,求
的值;
(3)如图3,
,
,若
,则
(用
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcba110804ba8bcfdc4a613b3703498.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/9ad367f6-5933-4e8b-9622-d74043692a90.png?resizew=559)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee3c84dcd732d8923c51e8bfed7bf97.png)
(2)如图2,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73529566506866e3a7d463662d0241ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15c78dfa0d664590aca39a048440a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3966339d0d3f0c51c9c94be38998767.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024f877368168750f0dcb850797f056c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c240223bf2166e100c906e0e41705aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ddc91c74ea11a895da1e57585767f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ff01f54e97b5d85b34907ea1da5754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】如图,在平面直角坐标系中,四边形ABCD为长方形,其中点A和点C的坐标分别为
,
,且AD
x轴,交y轴于点M,AB交x轴于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/bdf6782c-aa3d-485a-a761-fac9a7ee9356.png?resizew=312)
(1)直接写出点B的坐标______;
的度数为______.
(2)若动点P从点A出发,沿AB向点B运动,在点P运动过程中,连接MP,OP,试探究
,
,
之间的数量关系,并说明理由.
(3)若动点P从点A出发,沿AB→BC→CD以每秒0.25个单位长度的速度向终点D匀速运动,设点P的运动时间为t秒,当
的面积大于长方形ABCD面积的
时,直接写出时间t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe37dbbbde54a7ff0f7b37fff4b71c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b02102fb7cdf423abb58fc1f0b43f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/bdf6782c-aa3d-485a-a761-fac9a7ee9356.png?resizew=312)
(1)直接写出点B的坐标______;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c3ca226db5d490fa92bb1b7c8deb14.png)
(2)若动点P从点A出发,沿AB向点B运动,在点P运动过程中,连接MP,OP,试探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6500fbe1ea4a372d703502699b809e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc965e28afd369e51a8779928e15420c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467fe4b4911049cf77ba17962b844bef.png)
(3)若动点P从点A出发,沿AB→BC→CD以每秒0.25个单位长度的速度向终点D匀速运动,设点P的运动时间为t秒,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2b58424e893df4e01c912f87e09095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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