截止2021年3月15号,我国自主研发的新冠疫苗已接种超过6200万剂次.疫苗已经经过三期临床试验,测得成人注射一针疫苗后体内抗体浓度
与注射时间x天之间的函数关系如图所示(当
时,y与x是正比例函数关系;当
时,y与x是反比例函数关系).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/fa28586e-e5e6-49e4-8f7a-be767a6a6394.png?resizew=120)
(1)根据图像求当
时,y与x之间的函数关系式;
(2)根据图像求当
时,y与x之间的函数关系式;
(3)体内抗体浓度不低于140
的持续时间x的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a785ae45bd434e672d3ecacf9c429946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec2a6f0f4f303615393c63bd5465748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca8c0e0a27561769848a1a21d59f6be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/fa28586e-e5e6-49e4-8f7a-be767a6a6394.png?resizew=120)
(1)根据图像求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f37258303320180b68a879bce185bef.png)
(2)根据图像求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca8c0e0a27561769848a1a21d59f6be.png)
(3)体内抗体浓度不低于140
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5416d9170a4c2bb1b060dc21e45b0927.png)
更新时间:2023-12-15 19:08:15
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【推荐1】如下图,已知直线
:
与直线
:
交于点
,两直线与x轴分别交于点B和点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/3a1c12c8-8c09-47f5-91b3-8495fd54447e.png?resizew=245)
(1)求直线
和
的函数表达式;
(2)求四边形
的面积;
(3)如下图,点P为线段
上一动点,将
沿直线
翻折得到
,线段
交x轴于点E.当
为直角三角形时,请直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8737bd09e674276f3de31adeaf2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13653a89d3a38346e1ddf4fd1602f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/3a1c12c8-8c09-47f5-91b3-8495fd54447e.png?resizew=245)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d765dc623047dfd197e41637643df88a.png)
(3)如下图,点P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d06fad1ed5a452a835e9a02cb011ed2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/27ce9ba3-b8cd-4f42-bcc7-d94ad764d99e.png?resizew=512)
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【推荐2】如图:直线
与x轴、y轴分别交于A、B两点,
,点
是直线
上与A、B不重合的动点.
(1)求A、B两点的坐标.
(2)求直线
的解析式,并求出
的面积.
(3)当
的面积是6时,求点C的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ab3a7eb0f59993c7608576e47c0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33220afdd5ce0c9fb7322f7e6404886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9a016fd7021b9e9625c8d5f0938ad6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ab3a7eb0f59993c7608576e47c0f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/b5941e02-a990-4d91-b678-6578632909a9.png?resizew=166)
(1)求A、B两点的坐标.
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ab3a7eb0f59993c7608576e47c0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
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【推荐1】如图,直线
与直线
分别与
轴交于点
,
,两直线交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/9b145c8f-4394-4f3c-b73f-53fc9beaf5f7.png?resizew=141)
(1)求直线
、
与
轴的交点坐标;
(2)求
的面积;
(3)利用图象直接写出当
取何值时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a887d11303e00bbbaa7b88b6ce6d04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64636bd3a7c26c8f80dc3fecb4355c0.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/9b145c8f-4394-4f3c-b73f-53fc9beaf5f7.png?resizew=141)
(1)求直线
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
(3)利用图象直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
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【推荐2】如图,直线
分别交x轴,y轴于点
,
.直线
分别交x轴,y轴于点C,D,与直线
相交于点E,已知
.
的表达式;
(2)求
的面积;
(3)直接写出
时,x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962acb69a4c9755af062a79e3505d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cba284d675a3028d7a8d54f1f8ae70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b012c64d29c92edc6cef180c49c948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bdce4f15c156b8235fdec93bb4cf012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
(3)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
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【推荐1】如图,一次函数
的图象与反比例函数
的图象交于点A(
,
),C(3,n),交y轴于点B,交x轴于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/3d764279-3442-47ba-be6f-6b3753969713.png?resizew=183)
(1)求反比例函数
和一次函数
的表达式;
(2)连接OA,OC.求
的面积;
(3)根据图像直接写出当一次函数的值大于反比例函数的值时x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/3d764279-3442-47ba-be6f-6b3753969713.png?resizew=183)
(1)求反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
(2)连接OA,OC.求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d793ac00966fe2f864ab2e96e37cd8.png)
(3)根据图像直接写出当一次函数的值大于反比例函数的值时x的取值范围.
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【推荐2】如图,在平面直角坐标系中,一次函数y=kx+b(k≠0)的图象与反比例函数y=
(m≠0)的图象相交于A(2,
),B(-1,-1)两点.
(1)分别求出反比例函数和一次函数的解析式;
(2)根据图象写出:当x为何值时,一次函数值大于反比例函数值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7626c207a4dc82d4d59cb520c91e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfa1e7ffae662aefb49a44c52d4954d.png)
(1)分别求出反比例函数和一次函数的解析式;
(2)根据图象写出:当x为何值时,一次函数值大于反比例函数值?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/1d1de5f6-f56f-4826-8c89-d7c862430f94.png?resizew=163)
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