在平面直角坐标系中,点O为坐标原点,直线
交x轴于点A,交y轴于点B,直线
交x轴于点C,交y轴于点D,两直线交于点E,
,
.
(2)如图2,点P在x轴上,过点P作x轴的垂线交射线
于点M,交射线
于点N,设点P的横坐标为t,线段
的长为d,求d与t之间的函数关系式,直接写出t的取值范围;
(3)如图3,在(2)的条件下,
,点H在直线
上,点F在x轴上,点G在直线
上,连接
和
, 当四边形
为矩形,且
时,求点G的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36bba287ee8a7017b80007573d8105ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a975578a646b192ebe243c833ff54ec3.png)
(2)如图2,点P在x轴上,过点P作x轴的垂线交射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)如图3,在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5748495a9d6a364f488e288a4d2bf5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5afa2df59cf4bb0fab4a8dedab256fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff993dd4436592fd8694f8459760d4a3.png)
更新时间:2024-05-19 22:43:45
|
相似题推荐
解答题-问答题
|
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(0.4)
解题方法
【推荐1】如图,过
、
作x轴的垂线,分别交直线y=4-x于C、D两点.抛物线
经过O、C、D三点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/8a4b4fee-b6eb-4240-8682-c57f7dc78c85.png?resizew=208)
(1)求抛物线的表达式;
(2)点M为直线OD上的一个动点,过M作x轴的垂线交抛物线于点N,问是否存在这样的点M,使得以A、C、M、N为顶点的四边形为平行四边形?若存在,求此时点M的横坐标;若不存在,请说明理由;
(3)若△AOC沿CD方向平移(点C在线段CD上,且不与点D重合),在平移的过程中△AOC与△OBD重叠部分的面积记为S,试求S的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/8a4b4fee-b6eb-4240-8682-c57f7dc78c85.png?resizew=208)
(1)求抛物线的表达式;
(2)点M为直线OD上的一个动点,过M作x轴的垂线交抛物线于点N,问是否存在这样的点M,使得以A、C、M、N为顶点的四边形为平行四边形?若存在,求此时点M的横坐标;若不存在,请说明理由;
(3)若△AOC沿CD方向平移(点C在线段CD上,且不与点D重合),在平移的过程中△AOC与△OBD重叠部分的面积记为S,试求S的最大值.
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【推荐2】在一条笔直的公路上有
、
两地,甲、乙二人同时出发,甲从
地步行匀速前往
地,立刻以原速度沿原路返回
地.乙从
地步行匀速前往
地(甲、乙二人到达
地后均停止运动),甲、乙二人之间的距离
(米)与出发时间
(分钟)之间的函数关系如图所示,请结合图象解答下列问题:
(1)
、
两地之间的距离是 米,乙的步行速度是 米/分;
(2)图中
,
,
;
(3)求线段
的函数解析式.
![](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/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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/23/39474b9d-b378-4115-a458-fbe502d71035.png?resizew=237)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)图中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
(3)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐3】在平面直角坐标系
中,对于任意图形
及直线
,给出如下定义:将图形
先沿直线
翻折得到图形
,再将图形
沿直线
翻折得到图形
,则称图形
是图形
的
伴随图形.
例如:点
的[x轴,y轴]伴随图形是点
.
(1)点
的[x轴,y轴]伴随图形点
的坐标为 ;
(2)若直线
的解析式为:
,则点
的[
轴,
]伴随图形点
的坐标为 ;
(3)已知
,
,
,直线
经过点
.
①当
,且直线
与
轴平行时,点A的[
轴,
]伴随图形点
的坐标为 ;
②当
,点
的[
轴,
]伴随图形点
的坐标为
,求直线
的解析式 ;
③当直线
经过原点时,
的[
轴,
]伴随图形上只存在两个与
轴的距离为1的点,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531322f8ec2d4d27f8cc421ee67e7d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8031250b6291aebee065e46fe4db9700.png)
例如:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f46b1729ca4629a96df86ad76b1e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8953732afa4ffe84db02ca3a7b3b500.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e893b9b9e443ff357bd0d420a049bf07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e893b9b9e443ff357bd0d420a049bf07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04513792bb86e1fe4e305c870f27f4ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202a3125eb3a4b9239b2a217d0cf961d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5246f219efd906b34aa7b6dc876be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee74bec70d68998ec523fa5812760336.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d86b4ad722d7b720603eba9d330fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d86b4ad722d7b720603eba9d330fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6613b82990e81b6303f371aff97b6a32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
③当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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名校
解题方法
【推荐1】如图,直线l1:y=
x+
与y轴的交点为A,直线l1与直线l2:y=kx的交点M的坐标为M(3,a).
⑴a= ,k= ;
⑵直接写出关于x的不等式
x+
≥kx>0的解集 ;
⑶若点B在x轴上,MB=MA,直接写出点B的坐标 ;
⑷在x轴上是否存在一点N,使得NM-NA的值最大,若不存在,请说明理由;若存在,请直接写出点N的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
⑴a= ,k= ;
⑵直接写出关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
⑶若点B在x轴上,MB=MA,直接写出点B的坐标 ;
⑷在x轴上是否存在一点N,使得NM-NA的值最大,若不存在,请说明理由;若存在,请直接写出点N的坐标.
![](https://img.xkw.com/dksih/QBM/2020/6/12/2482991709667328/2485458314027008/STEM/1037490a26c0434dae6089555a3cdc7a.png?resizew=191)
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【推荐2】如图,直线
与y轴的交点为A,直线
与直线
的交点M的坐标为
.
(1)求a和k的值;
(2)直接写出关于x的不等式
的解集;
(3)若点B在x轴上,
,直接写出点B的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35fc9ed8d7d6d03ebd22b0581e224768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f4202e04f5804e6360f53d67d9eacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a53621da6c2e5926e13babae648189f.png)
(1)求a和k的值;
(2)直接写出关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce84583ff07f5fe5ef64ee1ddfac4fb.png)
(3)若点B在x轴上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7689902415361cd378b1ec3a97a908.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/19/2cdcc68e-7045-45b4-ac15-c1008675dc55.png?resizew=173)
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名校
【推荐1】如图,一次函数
的图象与
轴交于点
,与
轴交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/91f2aa16-a12f-429b-81c1-ebb51a79c530.png?resizew=390)
(1)点
的坐标为___________;点
的表达式为___________;
(2)在
轴上有一点
,在
轴上是否存在点
,使
是等腰三角形?若存在,求出所有符合条件的点
的坐标;若不存在,请说明理由:
(3)若
轴上的动点
在点
的右侧,以
为直角顶点,
为腰在第一象限内作等腰直角
,连接
并延长,交
轴于点
,当
运动时,点
的位置是否发生变化?若不变,请求出点
的坐标;若变化,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76fc88ea5357b675c01e93c62fea338d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/91f2aa16-a12f-429b-81c1-ebb51a79c530.png?resizew=390)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec32b9cfee142d1d4f68ab4771de77c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e377393277da863f5905c2f551be39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图,在平面直角坐标系中,已知点
,点
,沿
轴向右平移
,得
,直线
与线段
相交于点
,设
,以点
,
,
,
为顶点的四边形面积记为
.
![](https://img.xkw.com/dksih/QBM/2022/6/8/2996904477589504/3204427774517248/STEM/5ab22bc2219c4ea68479c3c932ca99c3.png?resizew=180)
(1)求
的长和
与
的函数关系式;(用相似)
(2)用含![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
的式子表示
;
(3)当
,求点
的坐标(直接写出结果).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27149c9ff20937492950f42084caa019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a80d4477c5fa6dc0a2f61003cf060a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a462108c97d4113f56f7e2cf25d5de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6637859805b7b01f7a9a64771563406e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/904f2b4225cd9fe392715092f9b12837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/2022/6/8/2996904477589504/3204427774517248/STEM/5ab22bc2219c4ea68479c3c932ca99c3.png?resizew=180)
(1)求
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9706ad89c33e82e4893848c65eab82f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92fc64249af4834214789a2574f1e97e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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