已知函数f(x)=2x(1)设函数y=f(x)的反函数为y=g(x),求函数y=

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问题:

已知函数f(x)=2x
(1)设函数y=f(x)的反函数为y=g(x),求函数y=g(x2-2x-3)的单调递增区间;
(2)求满足不等式f(|x+1|-|x-1|)≥2
2
的x的取值范围.
考点:函数的单调性、最值反函数
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空气中瓦斯含量达到一定浓度时就会发生瓦斯爆炸。

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北京到青岛887千米,陈叔叔骑自行车从北京去青岛旅游,平均每天行136千米,一周内能不能从北京到青岛?

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You don't have to read every text in the same way.

The way you read a text d____1____on your reason       

for reading it.To____2____some questions,you                

don't need to read every word of the passages.Just

glance q____3____through each text                               

l____4____for key words.Sometimes you need to           

read carefully in order to find____5____is hidden            

behind the line.Sometimes you can skin the texts until

you come to a____6____(关键) word and then              

you will need to read the_____7___(句子) around          

the word slowly and think about what____8____             

have read.If you want to be an efficient reader,you

should always think a ____9____why you are reading       

and then choose the best reading method to

____10____(达到) your purpose.                                   

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不定项选择
如图所示,电灯S发出的光先后经过偏振片A和B,人眼在P处迎着入射光方向,看不到光亮,则(   )

A.图中a光为偏振光

B.图中b光为偏振光

C.将B转过180°后,在P处将看到光亮

D.将B转过90°后,在P处将看到光亮

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造成锅炉燃烧事故的原因有哪些?

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