名校
解题方法
1 . 有一种鱼的身体吸收汞,身体中汞的含量超过其体重的
(百万分之一)的鱼被人食用后,就会对人体产生危害.某检测中心从一批这种鱼中随机抽取了50条,检测其汞含量(单位:ppm),并将所得数据分为6组:
,
,整理后得到如下频率分布直方图.
分位数(精确到0.01);
(2)由频率分布直方图估计这批鱼汞含量的平均值(同一组中的数据用该组区间的中点值为代表);
(3)从实际情况看,许多鱼的汞含量超标的原因是这些鱼在出售之前没有被检测过.你认为每批这种鱼的平均汞含量都比
大吗?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9298213068fff4ac610bf5798dfaca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3343505e6c410f3deb3bb88a9f3e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7dd93bf416a76869d807b1132049b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb00d558e456638de8ff1788db5a8d4.png)
(2)由频率分布直方图估计这批鱼汞含量的平均值(同一组中的数据用该组区间的中点值为代表);
(3)从实际情况看,许多鱼的汞含量超标的原因是这些鱼在出售之前没有被检测过.你认为每批这种鱼的平均汞含量都比
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9298213068fff4ac610bf5798dfaca7.png)
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名校
2 . 若函数
满足
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469836c2772f0c9c8e936a206dbb5edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529de93b3e98f0e3074fa740c1f492df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5cb13d3c924a553d2f545fc4617c8d.png)
A.1 | B.3 | C.4 | D.5 |
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名校
解题方法
3 . 已知
的内角
的对边为
,且
.
(1)求
;
(2)若
的面积为
,求内角
的角平分线AD长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93749cd429bde6b0f08cbfe810d0a9ab.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd037014e8a6d3dd6e7dca11d09cfc43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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4 . 已知
为坐标原点,对于函数
,称向量
为函数
的伴随向量,同时称函数
为向量
的伴随函数.
(1)设函数
,试求
的伴随向量
,
(2)记向量
的伴随函数为
,函数
,
①函数
在区间
上的最大值为
,最小值为
,设函数
,若
,求函数
的值域.
②把函数
的图象向右平移
个单位,得到函数
的图象,对于
,是否总存在唯一的实数
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c6f29b2b1955715616003d51d8b77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234eb91d6082d883d2c885ddfc629313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b73836b73b1808fa376ed96a9c85c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2183ba00d69af06d9a950469b38cfe4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
(2)记向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0064af62f1f04c857a732e4f440c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634c724698322471ccef44b1b61528fe.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7696508180d50353f80391088ff3c7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e93d044f7bde4330e206b4edd2bd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26c2d48c264304810689c150770f681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec9e237c17c09213d8102e33c16dad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f753e52eb14dbe8e5831e0951b054e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
②把函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27baf05c4898c79f80aabf8fbb44e7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39371adfa42c12d8956e062879e8ff7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d0ecdc4e948482a9f878255e2c6bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f0fdc707b18f83bc182d42b6324b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-06-09更新
|
249次组卷
|
2卷引用:四川省达州市万源中学2023-2024学年高一下学期5月月考数学试题
名校
解题方法
5 .
的内角
,
,
的对边分别为
,
,
,
.
(1)求角
的大小;
(2)若
,
的面积为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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)
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf7d9b37196f22db3b376bf13788580.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850e2bc625eca71b12044de26db2fa3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-05-16更新
|
1325次组卷
|
5卷引用:四川省渠县中学2023-2024学年高一下学期半期考试数学试题
名校
解题方法
6 . 若
,
,
均为单位向量,且
,
的取值范围是
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c220de24955cd942eaf2b87dbf9abf.png)
______ ,
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e687ec8f6c55f9a49af42c05c31538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc0c199128e763ec28c74aad2148edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c220de24955cd942eaf2b87dbf9abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/528b7f5b12406aee5c8cfb72a7f880e4.png)
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2024-05-06更新
|
176次组卷
|
2卷引用:四川省渠县中学2023-2024学年高一下学期半期考试数学试题
名校
解题方法
7 . 若
是边长为2的等边三角形,
所在平面有一点C满足
,且
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703b40a6293ed9e33001e2919379b168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d4397027495788c6d45c633f5be865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa462ba48511c46a67b425aafa75c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d621e8830787e1bd68f38843ad7bf3f9.png)
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解题方法
8 . 如图,四边形
的顶点都在圆
上,且
经过圆
的圆心,若圆
的半径为
,
,四边形
的面积为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7dc603317eb90974c75efec9f02b1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
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2024-05-03更新
|
185次组卷
|
2卷引用:四川省渠县中学2023-2024学年高一下学期半期考试数学试题
名校
解题方法
9 . 已知
,
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4a6d15129c22b08656b2feddb43e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0134d57e0c86a60b58226a8dfc105269.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6369cd1db768436809404b1f3c4132c0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4242b3bfa857e10db3ba05e65538bf6.png)
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10 . 已知函数
,
恒成立,且
在区间
上单调,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2b07516e11c1970f4cb32ea8fe7a0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfbb34218500146f6eba9ce609695e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13318e3ac203e20051cd43f094f0f312.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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