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1 . 分形几何是一门以不规则几何形态为研究对象的几何学,科赫曲线是比较典型的分形图形,1904年瑞典数学家科赫第一次描述了这种曲线,因此将这种曲线称为科赫曲线.其生成方法是:(I)将正三角形(图(1))的每边三等分,以每边三等分后的中间的那一条线段为一边,向形外作等边三角形,并将这“中间一段”去掉,得到图(2);(II)将图(2)的每边三等分,重复上述的作图方法,得到图(3);(Ⅲ)再按上述方法继续做下去……,设图(1)中的等边三角形的边长为1,并且分别将图(1)、图(2)、图(3)、…、图(n)、…中的图形依次记作
,
,
,…,
,…,设
的周长为
,则
为
![](https://img.xkw.com/dksih/QBM/2020/5/18/2465267297165312/2465579803590656/STEM/3c7d352171964290804c68568958498d.png?resizew=243)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32efe4eff75508cb93e828c735dcb695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f7eb99327cfa0971249c216f4fb207.png)
![](https://img.xkw.com/dksih/QBM/2020/5/18/2465267297165312/2465579803590656/STEM/3c7d352171964290804c68568958498d.png?resizew=243)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:福建省龙岩市2019-2020学年高三5月教学质量检查数学(理科)试题
福建省龙岩市2019-2020学年高三5月教学质量检查数学(理科)试题四川省绵阳中学2022-2023学年高三上学期期末模拟检测试题(已下线)专题20 科赫曲线(已下线)第五篇 向量与几何 专题20 分形几何 微点2 分形几何综合训练
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2 . 已知
中,角
、
、
所对的边分别是
、
、
且
,
,有以下四个命题:
①
的面积的最大值为40;
②满足条件的
不可能是直角三角形;
③当
时,
的周长为15;
④当
时,若
为
的内心,则
的面积为
.
其中正确命题有__________ (填写出所有正确命题的番号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df6bb52902ef2cb7ba7ef1a681cdb1a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
②满足条件的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b9446d7b31f0d6e044cf99deeb20aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b9446d7b31f0d6e044cf99deeb20aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
其中正确命题有
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4卷引用:四川省德阳市2018届高三二诊考试理科数学试题
3 . 以下各说法中:
①若等比数列
的前
项和为
,
,则实数
=-1;
②若两非零向量
,若
,则
的夹角为锐角;
③在锐角△ABC中,若
,则
,
④已知数列
的通项
,其前
项和为
,则使
最小的
值为5
其中正确说法的有________ (填写所有正确的序号)
①若等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b794ed9de8e93de6e067c3d0259558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②若两非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbc0945b4e1962e66f6f7e7f6af235d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
③在锐角△ABC中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b56c0452faa9377574227c3df2b4c46.png)
④已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c4593f37ce523cfa8fb5c102240319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
其中正确说法的有
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2卷引用:【校级联考】四川省乐山十校2018-2019学年高一下学期半期联考数学试题
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4 .
的内角
,
,
所对的边分别为
,
,
.已知
,且
,有下列结论:
①
;
②
;
③
,
时,
的面积为
;
④当
时,
为钝角三角形.
其中正确的是__________ .(填写所有正确结论的编号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/90929097f9e4ec1b521a224aaa485d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585d85a95ae83e6b7e4556eb63f3eeb6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18dccba7bc301e4913b1a4856afae466.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d697d914ec99d6edb5a6ab7efe1c5686.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15a13b4190ac3d5feaee27a4c97b21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be706891a18cdd3ae6d514d34990b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530be0354ac54e554421d9c82e5070e4.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58303bdbbdf9b78308135ee1ed413d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
其中正确的是
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6卷引用:四川省遂宁市射洪县射洪中学等2019-2020学年高三上学期第四次大联考数学(文)试题
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5 . 在数列
中,
,且
.记
,
,则下列判断正确的是__________ .(填写所有正确结论的编号)
①数列
为等比例数列;②存在正整数
,使得
能被11整除;
③
;④
能被51整除.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96eda44551ba886992ba70e427a763e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad555526b66f2ab33ed9a56c252f8023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f032a80a88d742cbaf00df5f7dff9944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30bd12847d6f7608f6778b6d14606d3.png)
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e160f5b23b74eb9929d6123b4cee2384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3b5ad9115eb354803901fc86efd7fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb352310b0ca1b455d9ff8d7cc84b9a8.png)
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5卷引用:四川省达州市高2018届高三上期末理科数学试卷
2012·福建龙岩·一模
6 . 由9个正数组成的数阵
每行中的三个数成等差数列,且
,
,
成等比数列.给出下列结论:
①第二列中的
必成等比数列;
②第一列中的
不一定成等比数列;
③
;
④若9个数之和大于81,则
>9.
其中正确的序号有 .(填写所有正确结论的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940d44b6c999f63f669f4e0166cba298.png)
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/6c6b9fd0f3e345e6b09685f3b92f252e.png)
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/15b05c9c2c864e0fb13a2006e2c9b4aa.png)
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/8c5b849d14634ba799404d0e2b6cbde3.png)
①第二列中的
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/dab5e3c0450d44f7bca696c85fcc94ab.png)
②第一列中的
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/096cdaf0eb6742609198b9c8214667c8.png)
③
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/7de5e0fbf7e24371b6ca3380b38abe1e.png)
④若9个数之和大于81,则
![](https://img.xkw.com/dksih/QBM/2014/6/30/1571803114070016/1571803119640576/STEM/2a8c23939581454ba78b9f49b2cae013.png)
其中正确的序号有 .(填写所有正确结论的序号).
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10-11高二下·四川成都·阶段练习
7 . 用2、3、5、7组成没有重复数字的四位数,再将这些四位数按从小到大排成一个数列,则这个数列的第18项是________ .(填写这个四位数)
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8 . 已知函数
.
![](https://img.xkw.com/dksih/QBM/2020/7/4/2498208255852544/2499529766445056/STEM/2e0fcc6e2ce44452bb37dffe9c364c2e.png?resizew=284)
(1)在直角坐标系中,画出函数
的图像;
(2)设
的最小值为m,若实数
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9cb12e07ffe363d574358b4a02eb0c0.png)
![](https://img.xkw.com/dksih/QBM/2020/7/4/2498208255852544/2499529766445056/STEM/2e0fcc6e2ce44452bb37dffe9c364c2e.png?resizew=284)
(1)在直角坐标系中,画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3644994397fab062669bab9f09441ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcccbceca353de17f318fe384f965e2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5b474ebbe652a21168cea18d3133f7.png)
您最近一年使用:0次
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9 . 已知函数
的最大值为
,其中
.
![](https://img.xkw.com/dksih/QBM/2020/3/23/2425941276098560/2426542267858944/STEM/a795953d53cf4d459db20ee7765c473e.png?resizew=221)
(1)求实数
的值并在图中画出
的图象;
(2)若
,
,且满足
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f11c883d06b968b03f4b92fd0b5280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://img.xkw.com/dksih/QBM/2020/3/23/2425941276098560/2426542267858944/STEM/a795953d53cf4d459db20ee7765c473e.png?resizew=221)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa46ad3bd5cffe0e1a7a7f9332a05d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4edbf2ba8dbf2df26f16b5b4a9bd417f.png)
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2020-03-24更新
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151次组卷
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2卷引用:2019届四川省成都石室中学高三适应性考试(二)数学(理)试题
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10 . 某工厂家具车间造
、
型两类桌子,每张桌子需木工和漆工两道工序完成.已知木工做一张
、
型桌子分别需要1小时和2小时,漆工油漆一张
、
型桌子分别需要3小时和1小时;又知木工、漆工每天工作分别不得超过8小时和9小时,而工厂造一张
、
型桌子分别获利润2千元和3千元.
(1)列出满足生产条件的数学关系式,并在坐标系中画出可行域;
(2)怎样分配生产任务才能使每天的利润最大,最大利润是多少?
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)列出满足生产条件的数学关系式,并在坐标系中画出可行域;
(2)怎样分配生产任务才能使每天的利润最大,最大利润是多少?
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2019-06-18更新
|
943次组卷
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5卷引用:四川省阆中中学2019-2020学年高二上学期10月月考数学(理)试题