在平面直角坐标系
中有两点
,
,若在
轴上有一点
,连接
,
,当
时,则称点
为线段
关于
轴的“半直点”.例:如图,点
,
,则点
就是线段
关于
轴的一个“半直点”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/7a4d1ecc-b8c9-475c-8617-613ccef3631d.png?resizew=143)
(1)示例中的线段
关于
轴的另一个“半直点”的坐标为________;
(2)若点
为抛物线
上的定线段
关于
轴的“半直点”,求点
的坐标.
(3)在平面直角坐标系中,点
与点
的坐标分别为
,
,点
为线段
关于
轴的“半直点”,对于
轴上任意一点
,都有
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6901e8b018a80e917540462d2f3aadd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7078a4e8e927c163c7f98e66759c9834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7727391bd56839d2b8d6879b8e6bf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1b6f209d1a805437046ca6ef79dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/7a4d1ecc-b8c9-475c-8617-613ccef3631d.png?resizew=143)
(1)示例中的线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a641f364003c2bd1dd6c81bbb03686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在平面直角坐标系中,点
![](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/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9c0002b13f6cae093cd9dc9f19941b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a8a86950aaab69782ff25b10b3d65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2022-12-19 21:05:17
|
相似题推荐
解答题-问答题
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困难
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【推荐1】在平面直角坐标系xOy中,对于给定的两点P,Q,若存在点M,使得△MPQ(△表示三角形)面积等于1(即S△MPQ=1),则称点M为线段PQ的“单位面积点”.
解答下列问题:
如图,在平面直角坐标系xOy中,点P的坐标为(2,0).
(1)在点A(﹣1,1),B(﹣1,2),C(2,﹣4)中,线段OP的“单位面积点”是 ;
(2)已知点D(0,3),E(0,4),将线段OP沿y轴方向向上平移t(t>0)个单位长度,使得线段DE上存在线段OP的“单位面积点”,求t的取值范围;
(3)已知点F(2,2),点M在第一象限且M的纵坐标是3,点M,N是线段PF的两个“单位面积点”,若S△OMN=3S△PFN,且MN∥PF,直接写出点N的坐标.
解答下列问题:
如图,在平面直角坐标系xOy中,点P的坐标为(2,0).
(1)在点A(﹣1,1),B(﹣1,2),C(2,﹣4)中,线段OP的“单位面积点”是 ;
(2)已知点D(0,3),E(0,4),将线段OP沿y轴方向向上平移t(t>0)个单位长度,使得线段DE上存在线段OP的“单位面积点”,求t的取值范围;
(3)已知点F(2,2),点M在第一象限且M的纵坐标是3,点M,N是线段PF的两个“单位面积点”,若S△OMN=3S△PFN,且MN∥PF,直接写出点N的坐标.
![](https://img.xkw.com/dksih/QBM/2020/7/20/2509739247312896/2510195507953664/STEM/ee6c2b24010c445b8a04ec8a0a51855c.png?resizew=264)
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【推荐2】材料阅读:材料一:若a是正整数,a除以6的余数为1,则称a是“余一数”.例如:13是正整数且
…1,则13是“余一数”.材料二:对于任意四位正整数p,p的千位数字为a、百位数字为b、十位数字为c、个位数字为d,规定:
.请根据以上材料,解决下列问题:
(1)判断:346,1537是不是“余一数”?并说明理由;
(2)若四位正整数q是“余一数”,q的千位数字与个位数字的和等于7,百位数字与十位数字的和等于6,千位数字与百位数字的和大于十位数字与个位数字的和,
是有理数,求所有满足条件的q.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed582fd9769ea6d505fdd09da76085b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577c5f17e513482698edc8cdf5825f49.png)
(1)判断:346,1537是不是“余一数”?并说明理由;
(2)若四位正整数q是“余一数”,q的千位数字与个位数字的和等于7,百位数字与十位数字的和等于6,千位数字与百位数字的和大于十位数字与个位数字的和,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78ab8d9a54cb052434db67155cfd58d.png)
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【推荐3】材料一:对于一个四位正整数,如果满足各数位上的数字互不相同,它的千位数字与个位数字之和等于百位数字与十位数字之和,那么称这个数为“和好数”.若和好数
(
,
,
,
且a、b、c、d均为整数),规定将p的十位数字与百位数字之差的3倍记为
,即
.
材料二:若一个数N等于另一个整数Z的平方,则称这个数N为完全平方数.
(1)请判断3264,5342是否是“和好数”,并说明理由;如果是,请计算
的值;
(2)若正整数s,t都是“和好数”,其中
,
,(
,
,
,
,且m、n、x、y都是整数),当
的值是一个完全平方数时,求满足条件的所有正整数s的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7145e4cfdb57fc2f06856b6aef7c1831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6fe0a044511f71c14c4a710f358581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ed081826d4582781dab08da4878dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037f8ffecb7de509ad8e637d8077d7b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8f779b55ed16b1137891277d94070a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254960851cff96395858b996bd547b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d82ec88890969b6881a85ac1eaf0f8.png)
材料二:若一个数N等于另一个整数Z的平方,则称这个数N为完全平方数.
(1)请判断3264,5342是否是“和好数”,并说明理由;如果是,请计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254960851cff96395858b996bd547b64.png)
(2)若正整数s,t都是“和好数”,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6728a61a3749ca4115d9985e8ce85a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c8e7576acf18754cba746b658381c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de103b2405a8fd84778220c348f4e157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcd9199d40a04d12c2edf052020636e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65c420d32443f397854a9f59e30e113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812a4090f1e21f56e56055f5048f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b846e36060a872e48fa3bcf8efeca524.png)
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【推荐1】在平面直角坐标系中,抛物线
与
轴交于
,
两点(点
在点
的左侧),与
轴交于点
,顶点为点
.
时,直接写出点
,
,
的坐标;
(2)如图
,直线
交x轴于点
,若
,
求
的值;
将直线
向上平移
个单位得到直线
,直线
与抛物线只有一个公共点,求
的值;
(3)如图
,在(
)的条件下,若点
为
的中点,连接
,动点
在第一象限的抛物线上运动,点
作
轴的垂线.垂足为
,交
于点
,交直线
于点
,过点
作
,垂足为
.是否存在
与
和的最大值?若存在,求出
与
和的最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f982d3ad3e6a23da0a763bb4a774ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f34f9141c604608c1834763e57c390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68cefebe47da32e18c68de85c6a6a173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67716ac738ee2911a69bf4063110a5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f59cd2155b7c37563e8e56d9076ba32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐2】已知抛物线
(m为常数).
(1)若该抛物线经过点(1,m+7),求m的值;
(2)若抛物线上始终存在不重合的两点关于原点对称,求满足条件的最大整数m;
(3)将该抛物线向下平移若干个单位长度,所得的新抛物线经过P(
,
),Q(7,
)(其中
)两点,当
时,点P是该部分函数图象的最低点,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6120688d617ce80f1f88be4681c625e6.png)
(1)若该抛物线经过点(1,m+7),求m的值;
(2)若抛物线上始终存在不重合的两点关于原点对称,求满足条件的最大整数m;
(3)将该抛物线向下平移若干个单位长度,所得的新抛物线经过P(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5377bf82396cdd7f37d98f8da003ca.png)
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【推荐1】在四边形
中,
,
,点
是边
的中点,连接
、
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/cb4f41d6-045a-4d4c-90f2-bf0183b63871.png?resizew=493)
(1)如图1,若
,连接
,求证:
;
(2)如图2,点
是边
的中点;
①若
,求
的长;
②直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1391573c30964b87ca3429bf67ae22aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3620030e8808da46df97330103827913.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/cb4f41d6-045a-4d4c-90f2-bf0183b63871.png?resizew=493)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a32884afd5c49777628d70827a9d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ea591a02f697ae9e2390d2a2ec0684.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c79dcbe3b4f3866f6c7440279a93f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f60a25a667fed5c0db4f6b8e29185d6.png)
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解答题-计算题
|
困难
(0.15)
【推荐2】如图①,已知在
中,
cm,
cm,以
为边作正方形
,点P从点B出发,沿
方向匀速运动,速度为1cm/s;同时,点Q从点A出发,沿
方向匀速运动,速度为2cm/s,点M从点A出发,沿
方向匀速运动,速度为1cm/s;当一个点停止运动,另外两个点也停止运动.分别连接
,
.设运动时间为t(s)(
),解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/2bb48a1c-ee5e-4fcd-834e-d178f7fce2fc.png?resizew=396)
(1)是否存在某一时刻t,使点P在
的垂直平分线上?若存在,求出t的值;若不存在,说明理由.
(2)当t为何值时,
为等腰三角形?
(3)如图②,连接MQ,设四边形
的面积为y(cm2),求y与t之间的函数关系式.
(4)当
时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdd5aafca6ffa00e05eab101031752b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1370d4c0ca64eed76b7dbdcf48358215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56b090cf3126e05ddef45aca79cc76f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/2bb48a1c-ee5e-4fcd-834e-d178f7fce2fc.png?resizew=396)
(1)是否存在某一时刻t,使点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
(2)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
(3)如图②,连接MQ,设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474938d9b9bcfb029c505305ba05627d.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a7f8f7af909beaa1f07318323e118a.png)
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【推荐1】已知抛物线
交
轴于点
、
,交
轴于点
,顶点为
,对称轴与
轴相交于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720012094660608/2721491387441152/STEM/bd4a8afe94ee42d3ab3a23620eef78e3.png?resizew=209)
(1)直接写出
的值__________;
(2)点
在射线
上,以点
为圆心的圆经过
、
两点,且与直线
相切,求点
的坐标;
(3)点
在线段
下方的抛物线上,当
为锐角三角形时,求
点横坐标的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d794141572c8b1e70957754f32b9eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720012094660608/2721491387441152/STEM/bd4a8afe94ee42d3ab3a23620eef78e3.png?resizew=209)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab6990b8426a4c952f6b9ad99e9f188.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】苏科版教材八年级下册第94页第19题,小明在学过圆之后,对该题进行重新探究,请你和他一起完成问题探究.
【问题提出】如图1,点
分别在方形
中的边
上,且
,连接
交于点
,求证:
.请你先帮小明加以证明.
的正方形
中,点E从点A出发,沿边
向点D运动,同时,点F从点B出发,沿边
向点A运动,它们的运动速度都是
,当点E运动到点D时,两点同时停止运动,连接
交于点M,设点
运动时间为t秒.
(1)如图1,在点
的运动过程中,点M也随之运动,请直接写出点M的运动路径长
.
(2)如图2,连接
,在点
的运动过程中.
①试说明点D在
的外接圆
上;
②若①中的
与正方形的各边共有6个交点,请直接写出t的取值范围.
【问题提出】如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce9b6bb1f3e46026af863b2b269ecf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06dee7dd054fce503a4336205dc5672f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5541d498cf8a609c87ec3a82006addcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8290323a3da9d76a509ba5d14daabe97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd6f4250ca6b1b9bce234a01f00d44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a3d3a63dd7256ce52cc2bd51a71fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce9b6bb1f3e46026af863b2b269ecf6.png)
(1)如图1,在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b88a92c3f78aab24d2cc6944c53ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b88a92c3f78aab24d2cc6944c53ec.png)
①试说明点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4013f8d06666aa51025ea0cb818ac124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②若①中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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