已知
,
是两个不相等的实数且
,我们约定,对于一个函数,如果它的自变量
与函数值
满足:当
时,
(
为正数),我们就称此函数是
上的“
倍函数”.例如:正比例函数
,当
时,
,则
是
上的“2倍函数”.
(1)已知反比例函数
是
上的“
倍函数”,求
;
(2)当
时,是否存在一次函数
在
上是“
倍函数”,若存在,请求出
的值;若不存在,请说明理由;
(3)若二次函数
是
上的“5倍函数”,求
、
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcb50f155690f7d2f67c72eac4638be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984f1d0e2b1f25bcf8adfa346490107a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcb50f155690f7d2f67c72eac4638be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00879cffccc124857ca755a8c345e45f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edf57d1ecdfaf8be1d2087d3e7d3358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00879cffccc124857ca755a8c345e45f.png)
(1)已知反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d0516facb9339502ab01e716fde2a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4679225fd864773339f248aaed35fbe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcb50f155690f7d2f67c72eac4638be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)若二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da5c0c263b11238e428b1bcea1cfc802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcb50f155690f7d2f67c72eac4638be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
2023·湖南长沙·二模 查看更多[2]
更新时间:2023-05-11 16:35:42
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知:
与
成正比例,且
时,
.
(1)求
与
之间的函数关系式;
(2)判断点
是否在这个函数的图像上;
(3)如果
的取值范围是
,请直接写出
的取值范围______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39241f2eeccaa16d0550d851619bcb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab907e757047a880cce2dc79635394cd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ecd1eb0eafdc172501d3731c9bbd2a.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be48cd4158fb76190935ab143de02ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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适中
(0.65)
【推荐2】如图,已知直线
经过点
、点
,交
轴于点
,点
是
轴上一个动点,过点
、
作直线
.
(1)求直线
的表达式;
(2)已知点
,当
时,求点
的坐标;
(3)设点
的横坐标为
,点
,
是直线
上任意两个点,若
时,
,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d429efe96d68065e7d433c996682791d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7284a2e151e316f48571971616cf80a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/8bd610f0-3c7d-43ed-a191-7b8c88cf4c18.jpg?resizew=153)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da45480afa71995b25af8159f61a70d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634f6c1092fc6378ff834a992915b5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198c3b302b3820e86763428eb1e91cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3463ced6030af957f13f9ba05b977c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-计算题
|
适中
(0.65)
名校
【推荐1】对于“已知
,求xy的最大值”这个问题,小明是这样求解的:
∵
,∴
,∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83bca5b9fe7f8b7ea32e38c7a0400d5.png)
∴
,所以xy的最大值为
.
请你按照这种方法计算:当
(
,
)时,
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b78b98443d32512ddcfe86aefd507db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83bca5b9fe7f8b7ea32e38c7a0400d5.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0050f60381c11bd08745623096f0a66e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
请你按照这种方法计算:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b300e303633b50ec5ecfaa392be4f9f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88ea271b3352d75008832f129d39dc0.png)
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(0.65)
【推荐2】在平面直角坐标系中,抛物线
(
为常数)与
轴交点坐标为
.
(1)求该抛物线的解析式;
(2)当
时.若抛物线的最小值为3,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b921c9737bcd6232191a8eedc4cc3ab5.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/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(1)求该抛物线的解析式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348771857779c9db5f85996a891111cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
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真题
【推荐1】已知反比例函数
(
为常数).
(1)若点
和点
是该反比例函数图象上的两点,试利用反比例函数的性质比较
和
的大小;
(2)设点
(
)是其图象上的一点,过点
作
轴于点
,若
,
(
为坐标原点),求
的值,并直接写出不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfc1850a7da01685c2a3dbe77c928f0.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761344479232/1773761344856064/STEM/7b39596129454a7d87968945eb6bb87f.png?resizew=13)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012f3bb233a2bd1f04e2e67b3c6358ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171b62becf0d7b07c1f9c1e3bc5c82dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b797e2f94af3420f767833e447fa4bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00243253ff56c25f9298430283ae97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208795e14dc3e232de8f370942fec2ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5a864b62146bc8f53af91648397ef2.png)
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【推荐2】已知反比例函数
(
为常数,
)的图象经过点
.
(1)求这个反比例函数的解析式;
(2)当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca979687ffb2214e747525635a6912c.png)
(1)求这个反比例函数的解析式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1ff41ddea19ffb1102a81c404764d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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