已知函数
.
(1)求函数
的单调递减区间;
(2)若函数
在
上有两个零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de1b2851603a4e68e61d578da0c6f98.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f394ac9c2012c1dfc61320c2c5d869f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b77857e15ae11fc94a5e33bfc12d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-01-19 22:14:51
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知函数
.
(1)把函数解析式化为
的形式;
(2)求函数
的最小正周期及值域;
(3)若
时,函数
有两个零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb0ad396ea7c64ac841592ab9361d18.png)
(1)把函数解析式化为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e2a383cb47eb87493e86c8c40caf0.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d87dd51a8e24e3134d2d1e5410a856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb578c3ddf7814dea4014e1d169c1f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】某同学用“五点法”画函数
在某一个周期内的图象时,列表并填入的部分数据如下表:
(1)请写出上表的
、
、
,并直接写出函数的解析式;
(2)将
的图象沿x轴向右平移
个单位得到函数
的图象,P、Q分别为函数
图象的最高点和最低点(如图),求∠OQP的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575c9fb9e3fe4cb33d21cb34052090f8.png)
x | |||||
0 | |||||
0 | 0 | 0 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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【推荐3】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e658113eadee1b45111b2a927c24e2f.png)
(1)某同学用“五点法”画出函数
在某一周期内的图像,列表如下:
请填写表中的空格,并写出函数
的表达式
(2)若
,将函数
的图像向右平移
个单位长度,再向下平移10个单位长度后得到函数
的图像,求函数
的零点所组成的集合;
(3)对于(2)中的函数
,证明:存在无穷多个互不相等的正整数
,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e658113eadee1b45111b2a927c24e2f.png)
(1)某同学用“五点法”画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![]() | ![]() | ![]() | ![]() | ||
![]() | 0 | ![]() | ![]() | ![]() | ![]() |
![]() | 0 | ![]() | 0 | 0 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3b825b865672c849f8bc7d45e6244e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
(3)对于(2)中的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21bbc2539e1b3815242c95118e9b0784.png)
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解题方法
【推荐1】在
,
均为锐角的
中,内角
,
,
所对的边分别为
,
,
,
是
的外接圆半径,且
.
(1)求
;
(2)若
,求
的值.
![](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/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/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce08d008b6251278dc282a0767e2df0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06430886275f5ad62bcda62fce691e99.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3075cc536cb3608f07bab13a1eb6f7e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b246aa3b56becc905d3fb64c6d5ec4a.png)
您最近一年使用:0次
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(0.65)
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解题方法
【推荐2】锐角
中,内角
的对边分别为
,已知
.
(1)求
;
(2)若
边上的中线长为
,求
的面积
.
![](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/8d9b6c0288e9a736cdc5b7e747880457.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654fc4b90e0e3e4753ddfae8b1ef9217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐1】已知函数
.
(1)求
求函数的最小正周期及对称中心.
(2)求函数
在
值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1280b1f1cfd75c18cdc5754da401fd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb48434bdcafb5e084fc0b6396cb9469.png)
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解题方法
【推荐2】如图,在
中,已知
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/23e106db-e851-487c-aea6-61ad943cb88e.png?resizew=119)
(1)求AD的长;
(2)若
,点E,C在直线AD同侧,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d2109e1b5f8157eeae14b0022878b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5d9391552147f0b0c2dac2ec79ebed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/23e106db-e851-487c-aea6-61ad943cb88e.png?resizew=119)
(1)求AD的长;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c5e7ab5a46dd74168a6555fd6bf6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50337fad727f63b856a2cb342cd230c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfda5a702b4667cf789a826677a1e20.png)
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【推荐3】如图所示,有一块扇形钢板
,面积是
平方米,其所在圆的半径为1米.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/53d8a004-f582-4679-81bd-0decf37e58dd.png?resizew=145)
(1)求扇形圆心角的大小;
(2)现在钢板
上裁下一块平行四边形钢板
,要求使裁下的钢板面积最大.设
,试问如何确定
的位置,才能使裁下的钢板符合要求?最大面积为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6c71a0da6a878a5b12bf8a8e784645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/53d8a004-f582-4679-81bd-0decf37e58dd.png?resizew=145)
(1)求扇形圆心角的大小;
(2)现在钢板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6c71a0da6a878a5b12bf8a8e784645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca6d348c4c0f53eb995246e1cb5ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d2408d04f4bcf651ef6d47ac75dc15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐1】已知
.
(I)求的
解析式;
(II)在
中,
分别是内角
的对边,若
的面积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142158b0c7eb5d684e7bebd70401277d.png)
(I)求的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(II)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d8d44bdeb86f8776c10fc98f01bc31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐2】已知函数
.
(1)求
;
(2)写出
的最小正周期及一条对称轴方程(只写结果);
(3)求函数
在
上的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e605f1d63568b3d277f8b3b3cd45a9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
(2)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
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