1 . 我们不妨约定:若点
,
是同一函数图象上不同的两点,且线段
轴,则称点A、B为这个函数的一对“平行点”.
(1)若点
和点
为函数
图象上的一对“平行点”,求
的值;
(2)关于
的函数
(m、n为常数)的图象上存在“平行点”吗?若存在,指出它有多少对“平行点”,若不存在,请说明理由;
(3)若点
、
、
都在关于
的函数
为常数,且
的图象上,点P,R为该函数图象上的一对“平行点”,且满足
.求直线
与
轴、
轴围成的三角形面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f021572c9349d56120b7094c34126623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52f13f1d62dd96a7a4df7498d166640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc195a9f7ac138e5a1ad87d5fa201c49.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093fdad4ecbf29897af965532a367e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/837ba2ee818c137be47190bae5357f63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369cd88d4c35ed3ca34aad3ee6a3c946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe6b690c21707c53f989b27e27b7c6e.png)
(2)关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c1972246a0a3d1c987d25205dbdd99.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4fb4662068009c46ab62798c2e84858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34317f92096a07be6e1094c85d058660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6ef13b2ba98d8a0a1dd808e8bebe91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea23c2c9849e783f0e7be9a0a533edcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b6d2853ae57f4d2c3b5a0ac6fd4a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89294b368777856b698dc9cb4a20c0c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bed1f1f133c211770978940c3220de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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2 . 如图1,以AB为直径作
,点
是直径AB上方半圆上的一点,连结AC,BC,过点
作
的平分线交
于点
,连结AD,过点
作
的切线交CB的延长线于点
.
.
(2)若
的半径为1,求
的最大值.
(3)如图2,连结AE,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0aa4c793921fdaa5d430cb90d78ca6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a597f44245bce1b2a7f9b4fc0f7f9e59.png)
(3)如图2,连结AE,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bef1a2cf39ade3666b223f865a3cb1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ebbb89ac9ec9860a8a3235c89a6182.png)
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3 . 老长沙有一首童谣:“杨裕兴的面,奇峰阁的鸭,德园的包子真好呷.”德园包子是湖南长沙地区的传统小吃之一.德园的掌案师傅历来都是技术高超的老师傅,老面发酵,所制包点皮薄馅大、面香浓郁、颜色白净、质地松软、面呈海绵状富有回弹性,口感特有嚼劲.小何到德园买早点,“阿姨,我买8个香菇肉包和5个酸菜包.阿姨说:“一共34元.”付款后,小何说:“阿姨,少买2个酸菜包,换3个香菇肉包吧.阿姨说:“可以,但还需补交5元钱.”
(1)请从他们的对话中求出香菇肉包和酸菜包的单价;
(2)如果小何一共有50元,需要买20个包子,他最多可以买几个香姑肉包呢?
(1)请从他们的对话中求出香菇肉包和酸菜包的单价;
(2)如果小何一共有50元,需要买20个包子,他最多可以买几个香姑肉包呢?
您最近一年使用:0次
4 . 如图,在
中,
,以
为直径作
,交
于点D,作切线
交
于点F.
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ebf3215a544f65ff55283bda648b9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f4f9da40e13f417b98a1568489b8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70abed7faf55deb24162255c5ad59577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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真题
5 . 已知抛物线
与x轴交点的坐标分别为
,
,且
.
(1)若抛物线
与x轴交点的坐标分别为
,
,且
.试判断下列每组数据的大小(填写
、
或
):
①
________
;②
________
;③
________
.
(2)若
,
,求b的取值范围;
(3)当
时,
最大值与最小值的差为
,求b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9660436030212dd771dbbafb8fda1ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9df2062940530232ab124a571e951ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb652143b43cc9439a347b2b1dc5cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(1)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf84a42522caaa72ef13f255adbf1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367304824e7eb354ffeb937fa209d80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe76678d86363d1c2a828e046202fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104ea0b930594d027e94236827f6c491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8637836592d705a0e9650c1f99c5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3040da0978a62d2c5e1efebaa1a1c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754737f7a148ed3ef33464ad7e8f9838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bb9ae14a9495733d41f701b674a7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65815bcbb22b569a2bfdf28ac698d9af.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae62acb0dfadef4340ede22968b665a.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e46371f310e03a153a1698aad9d4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9660436030212dd771dbbafb8fda1ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe26e5673a3af533756977a52122a72.png)
您最近一年使用:0次
真题
6 . 为增强学生体质,某校在八年级男生中试行“每日锻炼,每月测试”的引体向上训练活动,设定6个及以上为合格.体育组为了解一学期的训练效果,随机抽查了20名男生2至6月份的测试成绩.其中,2月份测试成绩如表1,6月份测试成绩如图1(尚不完整).整理本学期测试数据得到表2和图2(尚不完整).
本学期测试成绩统计表
(1)将图1和图2中的统计图补充完整,并直接写出a,b,c的值;
(2)从多角度分析本次引体向上训练活动的效果;
(3)若将此活动在邻校八年级推广,该校八年级男生按400人计算,以随机抽查的20名男生训练成绩为样本,估算经过一学期的引体向上训练,可达到合格水平的男生人数.
个数 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
人数 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
表1 |
1 | 平均数/个 | 众数/个 | 中位数/个 | 合格率 |
2月 | ![]() | ![]() | ![]() | ![]() |
3月 | ![]() | ![]() | ![]() | ![]() |
4月 | ![]() | ![]() | ![]() | ![]() |
5月 | ![]() | ![]() | ![]() | ![]() |
6月 | ![]() | ![]() | ![]() | ![]() |
表2 |
(1)将图1和图2中的统计图补充完整,并直接写出a,b,c的值;
(2)从多角度分析本次引体向上训练活动的效果;
(3)若将此活动在邻校八年级推广,该校八年级男生按400人计算,以随机抽查的20名男生训练成绩为样本,估算经过一学期的引体向上训练,可达到合格水平的男生人数.
您最近一年使用:0次
7 . 如图1,悬索桥两端主塔塔顶之间的主索,其形状可近似地看作抛物线,水平桥面与主索之间用垂直吊索连接.已知两端主塔之间水平距离为
,两主塔塔顶距桥面的高度为
,主索最低点P离桥面的高度为
,若以桥面所在直线为x轴,抛物线的对称轴为y轴,建立如图2所示的平面直角坐标系.
(2)若在抛物线最低点P左下方桥梁上的点
处放置一个射灯,该射灯光线恰好经过点P和右侧主索最高点D.
(i)求主索到射灯光线的最大竖直距离;
(ii)现将这个射灯沿水平方向向右平移,并保持光线与原光线平行,若要保证该射灯所射出的光线能照到右侧主索.则最多向右平移___________米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0aea8905e9076419bb3bfdbb34a762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56bf7b0e2ef962a699446f122e564bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386f5889ae7aa13ad09b3cdb4f7f89ae.png)
(2)若在抛物线最低点P左下方桥梁上的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3797d4c7ae59ea280eacf306d57fcdc9.png)
(i)求主索到射灯光线的最大竖直距离;
(ii)现将这个射灯沿水平方向向右平移,并保持光线与原光线平行,若要保证该射灯所射出的光线能照到右侧主索.则最多向右平移___________米.
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8 . 在平面直角坐标系
中,抛物线
与
轴交于
,
两点
点
在点
的左侧
,与
轴交于点
,点
是抛物线
位于第三象限上的点,连接
,
.
(1)若
,
,求
,
,
三点的坐标;
(2)在(1)的条件下,若存在点
,使得
,求点
的坐标;
(3)连接
,设
交
于点
,
的面积为
,
的面积为
,若
的最大值是
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08adf934218819b5a0f6c94020292d61.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/5963abe8f421bd99a2aaa94831a951e9.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/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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc895959e9bc92294dc9dd2263dbf0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.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/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在(1)的条件下,若存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a67e2468b878174cb7860af1584a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24676ed477d7b6a0782bead3f9b7ccf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
您最近一年使用:0次
真题
9 . 解不等式:
,把它的解集表示在数轴上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f354f0d3eb847f1f4366920cfa526c.png)
您最近一年使用:0次
10 . (1)如图①,
和
为等腰直角三角形,
,求证:
.
(2)如图②,
,
,试探究线段
与线段
的关系,并加以证明.
(3)如图③,
,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac6f98ed81727dc5f6699ea5117fff.png)
(2)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb018be331b3bd70b0ad11e0bd9f12be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8501c6b8c3ea9a9b965504ab987626b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fbdef9d23784b3d2c6dda57634e442.png)
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