实践与探究
情境:在正方形ABCD中,AB=5,点F在AC上,且
,过点F作EF⊥AC,交CD于点E,连接AE,AF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/283b2502-36ec-4081-9201-5dbd18fb421b.png?resizew=415)
(1)问题发现
图(1)中,线段AE与BF的数量关系是______;
直线AE与直线BF的夹角的度数是______.
(2)问题拓展
当△CEF绕点C顺时针旋转时,(1)中的结论是否成立?若成立,请仅就图2的情形给出证明;若不成立,说明理由.
(3)问题延伸
在(2)的条件下,当点F到直线BC的距离为2时,直接写出AE的长.
情境:在正方形ABCD中,AB=5,点F在AC上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da8046ae7d118efabe9e2fbadcfe92d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/283b2502-36ec-4081-9201-5dbd18fb421b.png?resizew=415)
(1)问题发现
图(1)中,线段AE与BF的数量关系是______;
直线AE与直线BF的夹角的度数是______.
(2)问题拓展
当△CEF绕点C顺时针旋转时,(1)中的结论是否成立?若成立,请仅就图2的情形给出证明;若不成立,说明理由.
(3)问题延伸
在(2)的条件下,当点F到直线BC的距离为2时,直接写出AE的长.
2021·河南洛阳·一模 查看更多[3]
更新时间:2022-04-08 13:31:51
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解答题-证明题
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解题方法
【推荐1】如图,在平行四边形ABCD中,对角线AC和BD相交于点O,点E在BC延长线上,AE平分∠BAD交CD于点F,点G为EF的中点,连接BG,CG,DG,△ABE的面积为S,△BGD的周长为l.
(1)求证:DF=BC;
(2)若GF=GC,试判断△DFG与△BCG是否全等,并说明理由;
(3)在(2)的条件下,若EC=2,S=32,求l.
(1)求证:DF=BC;
(2)若GF=GC,试判断△DFG与△BCG是否全等,并说明理由;
(3)在(2)的条件下,若EC=2,S=32,求l.
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【推荐2】如图,菱形OABC的边OC在x轴正半轴上,点B的坐标为(8,4).
(1)请求出菱形的边长;
(2)若反比例函数
经过菱形对角线的交点D,且与边BC交于点E,请求出点E的坐标.
(1)请求出菱形的边长;
(2)若反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/2017/5/31/1698893318807552/1699265209696256/STEM/89bec767b9f547ec9c6e2d3a8690afb0.png?resizew=169)
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【推荐1】已知四边形ABCD和AEFG都是正方形,
![](https://img.xkw.com/dksih/QBM/2019/10/17/2314021925625856/2315147860131840/STEM/fe46ef9004bb41569c55efaca0a2505b.png?resizew=543)
(1)如图1,E、G分别在AB、AD上,连CF,H为CF的中点,EH与DH的位置关系是 ,数量关系是 .
(2)如图2,在图1的基础上,把正方形AEFG绕A点顺时针旋转α(α为锐角),(1)中结论是否仍成立?若成立,请证明;若不成立,请说明理由.
(3)如图3,在(2)旋转过程中,当点F落在BC上,且AE:AB= 时,有AB平分EF.
![](https://img.xkw.com/dksih/QBM/2019/10/17/2314021925625856/2315147860131840/STEM/fe46ef9004bb41569c55efaca0a2505b.png?resizew=543)
(1)如图1,E、G分别在AB、AD上,连CF,H为CF的中点,EH与DH的位置关系是 ,数量关系是 .
(2)如图2,在图1的基础上,把正方形AEFG绕A点顺时针旋转α(α为锐角),(1)中结论是否仍成立?若成立,请证明;若不成立,请说明理由.
(3)如图3,在(2)旋转过程中,当点F落在BC上,且AE:AB= 时,有AB平分EF.
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解题方法
【推荐2】矩形
,
,
,
,(
),以
为旋转中心顺时针旋转矩形
,得到矩形
.
(1)如图1,当点
落在边
上时,求
的长;
(2)如图2,当
时,矩形
的对角线
交矩形
的边
于点
,连结
,若
是等腰三角形,求直线
的解析式.
(3)如图3,当
时,矩形
的对称中心为点
.
的面积为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/156e60370997869751e1c3dac2240be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a671406a5442a3088a4ee1d064114a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e9785a8ffb637c91757fe01d3c23a5.png)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e9785a8ffb637c91757fe01d3c23a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10a482b8847f35403f3f4955515e6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86349c2a6ccf517f9337177758ad36a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://img.xkw.com/dksih/QBM/2020/4/19/2445020870508544/2445832104157184/STEM/385e0a8b1628437fae6f53a07a03ed6e.png?resizew=524)
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【推荐1】已知,关于x的二次函数
的图像与x轴交于A、B两点(点A在点B左侧),与y轴交于点C,图像顶点为D,连接AC、BC、BD、CD,满足
.
![](https://img.xkw.com/dksih/QBM/2022/5/31/2991345250410496/2994156552560640/STEM/a8b4ac3b-ac77-44c1-9eea-a7d2944f48fa.png?resizew=203)
(1)请直接写出点A、点B的坐标以及a的取值范围;
(2)点
,点F在AC边上,若直线EF平分△ABC的面积,求点F的坐标(用含a的代数式表示);
(3)△BCD中CD边上的高是否存在最大值?若存在,求出这个最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97de2f33bfdf27456267e166a882c51d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7299a2e65eb815ee7176bab85e54557.png)
![](https://img.xkw.com/dksih/QBM/2022/5/31/2991345250410496/2994156552560640/STEM/a8b4ac3b-ac77-44c1-9eea-a7d2944f48fa.png?resizew=203)
(1)请直接写出点A、点B的坐标以及a的取值范围;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24d3fb296026f2ae044602520611fd4.png)
(3)△BCD中CD边上的高是否存在最大值?若存在,求出这个最大值;若不存在,请说明理由.
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【推荐2】在△ABC中,∠ACB=90°,AC=BC,点D为AB的中点,点E是AC上一点.连接DE,过D作DF⊥DE交BC点于F,连接EF.
(1)如图1,EF与CD相交于点G:
①来证:AE=CF;
②当AD=CE,AC=6时,求DG;
(2)如图2,点M为BC上一点,且∠CME=2∠ADE,AE=2,CE=5,求EM的长.
(1)如图1,EF与CD相交于点G:
①来证:AE=CF;
②当AD=CE,AC=6时,求DG;
(2)如图2,点M为BC上一点,且∠CME=2∠ADE,AE=2,CE=5,求EM的长.
![](https://img.xkw.com/dksih/QBM/2021/7/12/2762404973117440/2770431261155328/STEM/fdbf7213-3ede-4bac-bca2-682ceb2341aa.png)
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【推荐3】阅读以下材料,并按要求完成相应的任务
切割线定理:从圆外一点引圆的切线和割线,切线长是这点到与圆交点的两条线段长的比例中项.
证明过程如下:
如图1:已知:点P是
外一点,
是切线,F是切点,
是割线,点A,B是它与
的交点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a57e98836cf5d63823b2d037164175.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/b5a7f156-96d5-4062-ada1-ef2a2aa9f093.png?resizew=161)
证明:连接
并延长交
于C,连接
,
∵
是
的切线,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
(依据________________________________)
∵
是
的直径,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
(依据_______________________________)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d8c118643a1d55cfc3497ceb2a8ac3.png)
又∵
(依据_____________________________________)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1124efedf165b4ed2dbc2ab142e7e493.png)
. . . . . .
任务:
(1)完成材料证明部分中的“依据”,填入空格.
(2)把证明过程补充完整.
(3)定理应用:
已知
为
的切线,T是切点,
是
的割线,交
于D,
为
的直径,
,求
的长.
切割线定理:从圆外一点引圆的切线和割线,切线长是这点到与圆交点的两条线段长的比例中项.
证明过程如下:
如图1:已知:点P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0cbbcc3d79bf999588882e7b1b4324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a57e98836cf5d63823b2d037164175.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/b5a7f156-96d5-4062-ada1-ef2a2aa9f093.png?resizew=161)
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ff2a58162b98982ba77c64d4c65e5c.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95f2930c46f8891365843e34136dae14.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740543d6aeac697a5f64fdecc5805ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ccb88b98bd9f36c4e9b681926e1449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d8c118643a1d55cfc3497ceb2a8ac3.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a0100591de3da63089bbcf07885a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1124efedf165b4ed2dbc2ab142e7e493.png)
. . . . . .
任务:
(1)完成材料证明部分中的“依据”,填入空格.
(2)把证明过程补充完整.
(3)定理应用:
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d583183429b6b31aa9742eefc67d3181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0cbbcc3d79bf999588882e7b1b4324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236abcd5701f3d6d512f022a0f5abc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75442e6bf6f69e736c85edd31bb8692f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/c79cc31e-ee61-44d3-8d92-fecc9921b2be.png?resizew=161)
您最近一年使用:0次
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【推荐1】【探究】(1)如图1,在四边形中
中,
,
,
,E、F分别是
、
上的点,且
,探究图中线段
,
,
之间的数量关系.
小李同学探究此问题的方法是:
延长到点G,使
,连接
,先证明
,再证明
,即可得出
,
,
之间的数量关系.他的结论是 .
【拓展】(2)如图2,已知
是等腰直角三角形,
.将三角板的
角的顶点与点C重合,使这个角落在
的内部,两边分别与斜边
交于E、F两点,然后将这个角绕着点C在
的内部旋转,在点E、F的位置发生变化时,猜想线段
、
、
之间的数量关系,并说明理由;
【实际应用】(3)如图2,在四边形
中,
,
,若
,则四边形
的面积为__________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21eb847a1722ed6e10e23c59d53fe7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9eb456c912e01458c19b06e83a5c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
小李同学探究此问题的方法是:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc180eda08edfb6d54eb04da7741f099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac09e961b25848c2860065aa8f577e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382dcc8aa37ed16c588b41888c3906a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/11/b7e93970-3b13-441d-abad-ef96d2a52a7d.png?resizew=384)
【拓展】(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
【实际应用】(3)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b6e08fde74010412a6f14ad4dfbcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5a152f235942d11c74ef518fca7bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐2】在正方形
中,
是
边上一点,且点
不与
、
重合,点
在射线
上,将线段
绕点
顺时针旋转
得到线段
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/64fd1cbf-9a44-459f-87bb-8544650dff17.png?resizew=356)
(1)如图
,当点
在线段
上时,依题意补全图
;
(2)在图
的条件下,延长
,
交于点
,求证:
.
(3)在图
中,当点
在线段
的延长线上时,连接
,若点
,
,
恰好在同一条直线时,猜想
,
,
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/ac047e91852b91af639feec23a9598b2.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/64fd1cbf-9a44-459f-87bb-8544650dff17.png?resizew=356)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(2)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e862e9c76761490a4159b8425d33baca.png)
(3)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次