第十二题话题作文怎么写写?

来源：蜘蛛抓取(WebSpider) 时间：2015-06-21 03:43 标签： 十二英文怎么写
高中数学,第12题怎么做? _作业帮
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高中数学,第12题怎么做?
高中数学,第12题怎么做?&
f(1/33)=1/2f(4/33)=1/4f(16/33)=1/8f(32/33) f(32/33)=f(1-1/33)=1-f(1/33) 8f(1/33)=1-f(1/33)9f(1/33)=1f(1/33)=1/9
求f(1/33)吗？
在网上给你找的 希望能帮助你 ，望采纳请帮看下这个阅读短文的第12题该怎么写,为什么?C)The young violin player Vanessa-Mae was the first musician to use dance and rock music in classical（古典的）music.Vanessa-Mae love pop music,and she was also a very good classica_作业帮
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请帮看下这个阅读短文的第12题该怎么写,为什么?C)The young violin player Vanessa-Mae was the first musician to use dance and rock music in classical（古典的）music.Vanessa-Mae love pop music,and she was also a very good classica
请帮看下这个阅读短文的第12题该怎么写,为什么?C)The young violin player Vanessa-Mae was the first musician to use dance and rock music in classical（古典的）music.Vanessa-Mae love pop music,and she was also a very good classical violinist,and she brought these kinds of music together.Vanessa-Mae was born in Singapore on October 27,1978.She moved to London with her family when she was four.A year later,she started to learn the violin.When she was eight,she went to Beijing to study the violin.When she was ten,she played with a very famous group of classical musicians.But Vanessa-Mae doesn’t only play the violin.She learnt the piano before she started to play the violin.She likes lots of different kinds of music,from Beethoven to the Beatles,and she wants to play the music she likes.Not only has she played in classical concerts all over the world,but she has also played in pop concerts with pop stars.A lot of people don’t like the way she uses modern rhythms（节奏）,noisy drums and guitars in traditional music.But Vanessa-Mae has done one important thing:she has brought many new fans to classical music.For the first time,many young people began to listen to classical music.12.was the first instrument（乐器）she learnt to play.A.The violin B.The piano C.The drums D.The guitar
a 看出she was four.A year later,she started to learn the violin2012年高考山东理科数学第十二题答案是不是出错了，为什么答案是B，请各位老师解答？_百度知道
2012年高考山东理科数学第十二题答案是不是出错了，为什么答案是B，请各位老师解答？
您是说公布的答案出错了？
我有更好的答案
从有两个交点选b 找到b和a的关系 ，然后赋值给a b 验证x=1 与x=-1 的函数值大小，说明是二次函数的顶点是其中一个
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出门在外也不愁第十二题怎么写? _作业帮
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第十二题怎么写?
第十二题怎么写?&第十二题，怎么做？悬赏100！_百度知道
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太给力了，你的回答完美的解决了我的问题！
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解：折叠后ED⊥AB则∠ADE=∠ADB=90º，∠EAD=∠BAC∴⊿AED∽⊿ABC∴AD/AC=DE/BC∵BC=6，AC=8，订辅斥恍俪喝筹桶船垃根据勾股定理AB=10∴AD=½AB=5DE=AD×BC÷AC=5×6÷8=3.75S⊿BDE=½×5×3.75=75/8S⊿BCE=S⊿ABC-2S⊿BDE=24-75/4=21/4S ⊿BCE/S⊿BDE=14/25选B
将△ABC如图那样折叠 △ADE≌△ACB 且DE⊥ABAD=BD=(1/2)AB=(1/2)√(6^2+8^2)=5△ACB∽△ADE AC/BC=AD/DE DE=(AD*BC)/AC=5*6/8=15/4AE=√(BD^2+DE^)=√((5^2+(15/4))=25/4S△BCE：S△BDE=(1/2)6(8-25/4)：(1/2)5*(15/4)=14：25
B 我好歹也是数学老师
我要过程啊
等我会 我给你打步骤
解：折叠后ED⊥AB则∠ADE=∠ADB=90º，∠EAD=∠BAC∴⊿AED∽⊿ABC∴AD/AC=DE/BC∵BC=6，AC=8，根据勾股定理AB=10∴AD=½AB=5DE=AD×BC÷AC=5×6÷8=3.75S⊿BDE=½×5×3.75=75/8S⊿BCE=S⊿ABC-2S⊿BDE=24-75/4=21/4S ⊿BCE/S⊿BDE=14/25选B
用一个相似比就行了，
我感觉应该是比B
亲做的可以吗
b.要过程吗
祝你学习顺利
亲。。。。。
是因为太乱了吗？？。。。。。抱歉，，，，，
利用相似先求ED
再用勾股定理求AE
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