已知,AB⊥AC,且AB=AC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/de905bf9-db88-44b6-a6de-64d291e2a0b3.png?resizew=555)
(1)如图1,若点D、点E分别在线段
上,且
,连接
,取
的中点
,连接
.判断线段
与
的关系,并说明理由;
(2)在图1的基础上,连接
,将
绕点
旋转一定角度,如图2所示.线段
与
的关系是否仍然成立,并说明理由;
(3)如图3,若点
在线段
上,
,点
为平面内一动点,且满足
,连接
,将
绕点
逆时针旋转
到
,连接
,求
的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/de905bf9-db88-44b6-a6de-64d291e2a0b3.png?resizew=555)
(1)如图1,若点D、点E分别在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae1210a744ae636419de68a525faf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be75025967f332a1e3f44e7c26e160f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在图1的基础上,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e63b65e120d8f4dcf1b3589eed823b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f0a3f78d51f10acd0e87c124c96a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6b7a99f74d5263c23c5255c6ce253d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
更新时间:2022-10-31 17:20:22
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,点
为
的外角
的平分线上一点,
,
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/313cdc3f-cb8b-41e3-a439-47e74826bf93.png?resizew=316)
(1)求证:
;
(2)若
,连接
,
,
,求
的长度;
(3)如图2,若
,
分别是边
,
上的点,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ef99db257cc1acb08e3a5e0006d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/313cdc3f-cb8b-41e3-a439-47e74826bf93.png?resizew=316)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f676510d4cc0c3eaa212dde1453b009.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887553ca085a00e81d631155e25f629b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8825d400f453c5c17a7beeb1cc9a9cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(3)如图2,若
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8df987b1252f4955b509fc587341bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38446fc2b9fabc5a647fce7bc7addee.png)
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【推荐2】如图,
是等腰直角三角形,
,
,点D为平面内任意一点,将线段
绕点C逆时针方向旋转
得到线段
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/584654f3-6697-43a0-ba78-0c8acb7ab645.png?resizew=429)
(1)若点D为
内部任意一点时,
①如图1,判断线段
与
的数量关系并给出证明;
②如图2,连接
,当点E,D,B在同一直线上且
时,求线段
的长;
(2)如图3,直线
与直线
相交于点P,当
时,延长
到点F,使得
,连接
,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133760237c0ccf2d6a83786925b6d23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/584654f3-6697-43a0-ba78-0c8acb7ab645.png?resizew=429)
(1)若点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①如图1,判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图3,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042763e09cec08506df433f8ad96f19f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
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名校
【推荐3】【发现问题】爱好数学的小明在做作业时碰到这样的一道题目:如图①,点
为坐标原点,
的半径为1,点
.动点B在
上,连结AB,作等边
(A,B,C为顺时针顺序),求OC的最大值.
![](https://img.xkw.com/dksih/QBM/2021/12/18/2875356578054144/2877426479284224/STEM/7810c578-dfde-48b6-98b6-64f5a10ab478.png?resizew=364)
【解决问题】小明经过多次的尝试与探索,终于得到解题思路:在图①中,连接OB,以OB为边在OB的左侧作等边三角形BOE,连接AE.
(1)请你找出图中与OC相等的线段,并说明理由;
(2)线段OC的最大值为_______.
【灵活运用】
(3)如图②,
,点D是以BC为直径的半圆上不同于B、C的一个动点,以BD为边在BD的右侧作等边
,求AC的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2021/12/18/2875356578054144/2877426479284224/STEM/7810c578-dfde-48b6-98b6-64f5a10ab478.png?resizew=364)
【解决问题】小明经过多次的尝试与探索,终于得到解题思路:在图①中,连接OB,以OB为边在OB的左侧作等边三角形BOE,连接AE.
(1)请你找出图中与OC相等的线段,并说明理由;
(2)线段OC的最大值为_______.
【灵活运用】
(3)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83cb6327dcbc8a998e6586bcfa7a3b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
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【推荐1】如图,在梯形ABCD中,AD∥BC,∠B=90°,AD=8cm,AB=6cm,BC=10cm,点Q从点A出发以1cm/s的速度向点D运动,点P从点B出发沿BC方向以2cm/s的速度向点C运动,P,Q两点同时出发,当点P到达点C时,两点同时停止运动,设运动时间为t秒.
(1)当t等于多少时,四边形ABPQ的面积为18cm2;
(2)若以P,Q,C,D为顶点的四边形是平行四边形,求t的值;
(3)当0<t<5时,若DQ≠DP,当t为何值时,ADPQ是等腰三角形?
(1)当t等于多少时,四边形ABPQ的面积为18cm2;
(2)若以P,Q,C,D为顶点的四边形是平行四边形,求t的值;
(3)当0<t<5时,若DQ≠DP,当t为何值时,ADPQ是等腰三角形?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/8b3bd1b3-2652-4a13-bb14-250093721c2d.png?resizew=362)
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【推荐2】如图,Rt△ABC中,∠ACB=90°,AC=4,BC=3,P是斜边AB上的一个动点(点P与点A、B不重合),以点P为圆心,PA为半径的⊙P与射线AC的另一个交点为D,射线PD交射线BC于点E.
(1)如图1,若点E在线段BC的延长线上,设AP=x,CE=y,
![](https://img.xkw.com/dksih/QBM/2014/3/17/1573715419947008/1573715426000896/STEM/54fd51e9a0c240f58a7350626dbd8e31.png)
①求y关于x的函数关系式,并写出x的取值范围;
②当以BE为直径的圆和⊙P外切时,求AP的长;
(2)设线段BE的中点为Q,射线PQ与⊙P相交于点I,若CI=AP,求AP的长.
(1)如图1,若点E在线段BC的延长线上,设AP=x,CE=y,
![](https://img.xkw.com/dksih/QBM/2014/3/17/1573715419947008/1573715426000896/STEM/54fd51e9a0c240f58a7350626dbd8e31.png)
①求y关于x的函数关系式,并写出x的取值范围;
②当以BE为直径的圆和⊙P外切时,求AP的长;
(2)设线段BE的中点为Q,射线PQ与⊙P相交于点I,若CI=AP,求AP的长.
![](https://img.xkw.com/dksih/QBM/2014/3/17/1573715419947008/1573715426000896/STEM/93dfb008db6e429889b587ed6b4b3a55.png)
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【推荐1】如图(1),已知
,
,且
,将
绕C点旋转(A、C、D三点在同一直线上除外).
(1)求证:
;
(2)在
绕C点旋转的过程中,若
、
所在的直线交于点F,当点F为边
的中点时,如图2所示.求证:
(提示:利用类倍长中线方法添加辅助线);
(3)在(2)的条件下,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f145e6d68a0903d4d10f27cf647ddc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/d13b84bc-8d38-4826-9dcc-3f9e52cfaac1.png?resizew=482)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4db192a176978a1240d931677724694.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c38b75a1524cf5ff1d63ab23983d8ca.png)
(3)在(2)的条件下,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
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【推荐2】如图,直线
,一副直角三角板
,
中,
,
,
,
.
(1)若
,
如图1摆放时,求
的度数;
(2)若图2中
固定,将
沿着
方向平移,边
与直线
相交于点
,作
和
的角平分线
、
相交于点
,求
的度数;
(3)若图1中
固定,(如图3)将
绕点
顺时针旋转,2分钟转半圈,旋转至
与直线
首次重合的过程中,当线段
与
的一条边平行时,请求出旋转的时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7928198bde37727e3a04a7f3e6b306fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91f064bb73019053992fe781a53356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d15e86182df309fd0ffb2e9112c11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5101ab05fce5c1190dc22f7e7887aaa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e6219ce9770e9e048bfe015fb53346.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/1/0704a0fb-9cb4-47c2-9466-5832e6d4d761.png?resizew=499)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1703c6a49c511f8f82123ff561d8e91.png)
(2)若图2中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acba637d3414f693b819d30e3d35938d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6771cbdbbefefad25f4b7fe88fdecf65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e788a903eea2fd11781f0a9ce10f3000.png)
(3)若图1中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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解答题-计算题
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较难
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名校
【推荐1】某数学兴趣小组,开展项目式学习,问题如下:
抛物线
与
轴正半轴分别交于
、
两点
点
在点
的右边
,与
轴交于点
,点
为抛物线上位于第一象限内的一动点
在
的右侧
,过点
、
的直线交
轴于点
,过点
、
的直线交
轴于点
,连接
、
、
,试探究
、
、
、
之间的数量关系.
为研究该问题,小组拟采用问题研究的一般路径
从特殊到一般的研究方法:
(1)设
,
,
.
①若点
的横坐标为
,请计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ae4d1366da853e83cbe41668dc992f.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd0d33479d8f86083ad782ab76e1db.png)
;比较大小:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ae4d1366da853e83cbe41668dc992f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836f2cd7c1bf45a865b7d6bcb3e8f2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd0d33479d8f86083ad782ab76e1db.png)
填
,
或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f14ad8fcd39c3e03d4a2012cba9ad5.png)
②若点
的横坐标为
,上述
与
之间的数量关系是否仍然成立,若成立,请证明;若不成立,请说明理由.
(2)小明在研究室发现:当A、B两点的横坐标为
,
(
)时,将抛物线变形为
,研究此问题更加方便,请借助小明的发现验证你的猜想.
(3)请利用上述经验,解决项目式问题,若
,请直接写出
的取值范围________.
抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d92dc7f59572fc5aeba24c37ef09a3a.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/fd995178601c2ad7b40f973d268c7bb7.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/04582116cd765fcc5a52f44279ad6c94.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f57b9464c57e18c4ceb2056007fd9a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
为研究该问题,小组拟采用问题研究的一般路径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b647ade22a4b2a37f8d14141b773744.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce4430b8b9b0c78de693513a7f88915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ae4d1366da853e83cbe41668dc992f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85bf04690ebfef86066beff234bc583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd0d33479d8f86083ad782ab76e1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85bf04690ebfef86066beff234bc583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ae4d1366da853e83cbe41668dc992f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836f2cd7c1bf45a865b7d6bcb3e8f2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd0d33479d8f86083ad782ab76e1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb10f0d3832ccbba4ccf1f05a68c70ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1ce6e29c25b26918adb0f2b123c928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f14ad8fcd39c3e03d4a2012cba9ad5.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ae4d1366da853e83cbe41668dc992f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd0d33479d8f86083ad782ab76e1db.png)
(2)小明在研究室发现:当A、B两点的横坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44f1797265f953befcca65aad04d5da.png)
(3)请利用上述经验,解决项目式问题,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2739ccac4d9b8c91e9089f348fa8a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图所示,
中,
,
,
,点
从点
出发,以
的速度沿边
向终点
运动,过点
作
于点
,并作
关于直线
对称的
,设点
的运动时间为
,
与
的重叠面积为
.
(1)当点
在边
上时,
______
(用含
的代数式表示).
(2)当点
与点
重合时,求
的值;
(3)求
与
的函数关系式,并直接写出自变量
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3faa38a184366222ca4da1263d60991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fae188b381c5ba01b3d9d742c687dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2d58317c533f9ec5e5722e7a5d1618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8daff96303a07819bd4ee47731e73b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7f32e4c7d1fcafc3fe0dbcf08fdd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/badf443a-e61b-4617-ac44-5d501fcffaed.png?resizew=263)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-证明题
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【推荐3】【了解概念】
【了解概念】
在凸四边形中,若一边与它的两条邻边组成的两个内角相等,则称该四边形为邻等四边形,这条边叫做这个四边形的邻等边.
【理解运用】
(1)邻等四边形ABCD中,∠A=30°,∠B=70°,则∠C的度数为 ______ .
(2)如图,凸四边形ABCD中,P为AB边的中点,△ADP∽△PDC,判断四边形ABCD是否为邻等四边形;并证明你的结论;
【拓展提升】
(3)在平面直角坐标系中,AB为邻等四边形ABCD的邻等边,且AB边与x轴重合,已知A(-1,0),C(m,2
),D(2,3
),若在边AB上使∠DPC=∠BAD的点P有且仅有1个,请直接写出m的值.
【了解概念】
在凸四边形中,若一边与它的两条邻边组成的两个内角相等,则称该四边形为邻等四边形,这条边叫做这个四边形的邻等边.
【理解运用】
(1)邻等四边形ABCD中,∠A=30°,∠B=70°,则∠C的度数为 ______ .
(2)如图,凸四边形ABCD中,P为AB边的中点,△ADP∽△PDC,判断四边形ABCD是否为邻等四边形;并证明你的结论;
【拓展提升】
(3)在平面直角坐标系中,AB为邻等四边形ABCD的邻等边,且AB边与x轴重合,已知A(-1,0),C(m,2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/d5266e90-3da6-496e-8618-03e6509d928d.png?resizew=174)
您最近一年使用:0次