如图,在矩形
中,
,动点
分别从点
同时出发,P点以每秒1个单位长度的速度沿着
运动,到达A点停止运动,点Q以每秒
个单位长度的速度由
运动,到达D点停止运动,P点运动时间为t秒,令
的面积为
的面积为
.回答下列问题:
与t之间的函数关系式以及对应的t的取值范围;
(2)请在平面直角坐标系中画出
的图象,并写出
的一条性质;
(3)根据图像,直接写出当
时,t的取值范围_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebb9945e4d5e46d28d2a78ed09ae715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3015eea1309a7cea34438008d082233d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ca7ae3211daf70f72d45d2bddec0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7012d1ff11db5e150182e19646814cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f951a536cc785994e26d39407d20c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548edc04dfb90652f2584520b820f739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b2a8413fd70da5b413b800ef2b70c0.png)
(2)请在平面直角坐标系中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b2a8413fd70da5b413b800ef2b70c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)根据图像,直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
更新时间:2024-05-07 10:23:23
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相似题推荐
解答题-作图题
|
适中
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名校
【推荐1】如图1,在矩形
中,
,
,动点P从点B出发,延折线B-C-D运动,到达点D时停止运动,设点P的运动路程为x,由点A、B、P、D围成的图形的面积为y.请解答下列问题:
(1)请直接写出y与x之间的函数表达式及x的取值范围,并在图2所示的平面直角坐标系中画出y的函数图象;
(2)根据函数图象,写出函数y的一条性质;
(3)结合函数图象,直接写出当
时x的值(结果保留一位小数,误差范围不超过0.2).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/07211149-a4fe-40bc-8a07-48f816028713.png?resizew=392)
(1)请直接写出y与x之间的函数表达式及x的取值范围,并在图2所示的平面直角坐标系中画出y的函数图象;
(2)根据函数图象,写出函数y的一条性质;
(3)结合函数图象,直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971751ce826c71fb6ec79969d45a9fdc.png)
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真题
【推荐2】某蔬菜基地有甲、乙两个用于灌溉的水池,他们的最大容量均为
,原有水量分别为
、
,现向甲、乙同时注水,直至两水池均注满为止,已知每分钟向甲、乙的注水量之和恒定为
,若其中某一水池注满,则停止向该水池注水,改为向另一水池单独注水,设注水第
时,甲、乙水池的水量分别为
、
.
(1)若每分钟向甲注水
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、
与
之间的函数表达式;
(2)若每分钟向甲注水
,画出
与
之间的函数图像;
(3)若每分钟向甲注水
,则甲比乙提前
注满,求
的值.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59f186e939c437d10dffdda01f09c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8afd6cacd611fd4a540401afa49b13eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0517f613490835de4ba495c19c358e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fe963f369369be8f2005981446cf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b9092363a57e8ce008d1ee21d872b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079b26850d2935ccd306d377e7e2818b.png)
(1)若每分钟向甲注水
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2151644ac073deca9019f037051fa43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若每分钟向甲注水
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62314e95376d3ef980d537823e3bed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若每分钟向甲注水
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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【推荐1】如图,已知直线
与直线
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、
的值;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1329ed8263f26cb24526664164541e80.png)
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(2)请结合图象直接写出不等式
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【推荐2】如图,在平面直角坐标系中,直线AB的解析式为
,它与x轴交于点B,与y轴交于点A,直线y=-x与直线AB交于点C.动点P从点C出发,以每秒1个单位长度的速度沿射线CO运动,运动时间为t秒.
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(1)求△AOC的面积;
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(1)求△AOC的面积;
(2)设△PAO的面积为S,求S与t的函数关系式,并写出自变量的取值范围;
(3)M是直线OC上一点,在平面内是否存在点N,使以A,O,M,N为顶点的四边形是菱形?若存在,请直接写出点N的坐标;若不存在,请说明理由.
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【推荐1】如图,小肖同学从滑雪台
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解答题-证明题
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解题方法
【推荐2】点
为
外一点,
,
.
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(1)如图1,
,
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;
(2)如图2,若
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,
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(1)如图1,
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(2)如图2,若
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(3)如图3,若
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解答题-计算题
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【推荐1】小勇要帮助船夫计算一艘货船是否能够安全通过一座圆弧形的拱桥,现测得桥下水面
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,船舱顶部为矩形并高出水面
.请你判断一下,此货船能顺利通过这座拱桥吗?说说你的理由.
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/468d5990-6053-49f8-8c4f-c2105684f1ac.png?resizew=178)
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解答题-问答题
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【推荐2】如图①,在
的内部作一个矩形
,其中
和
分别在两直角边上,
,
.
(1)如果设矩形的一边
,设矩形的面积为
,当x取何值时,y的值最大?最大值是多少?
(2)如果把矩形改为如图②所示的位置,其他条件不变,那么矩形的最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c922cbd707131b52757c464804ca24f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/52b39242-8a4e-45e5-951b-4a6f05a1e325.png?resizew=309)
(1)如果设矩形的一边
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(2)如果把矩形改为如图②所示的位置,其他条件不变,那么矩形的最大面积是多少?
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