已知函数f(x)=log
2(x+1),当点 (x,y) 是函数y=f (x) 图象上的点时,点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225150215055544/SYS201311012251502150555020_ST/0.png)
是函数y=g(x) 图象上的点.
(1)写出函数y=g (x) 的表达式;
(2)当g(x)-f (x)≥0时,求x的取值范围;
(3)当x在 (2)所给范围内取值时,求g(x)-f(x)的最大值.
考点分析:
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判断
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225150215055544/SYS201311012251502150555019_ST/0.png)
(x∈[0,3])的单调性,并证明你的结论.
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求下列函数的值域:(1)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225150215055544/SYS201311012251502150555018_ST/0.png)
;(2)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225150215055544/SYS201311012251502150555018_ST/1.png)
,x∈[-2,2].
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若{x,xy,lg(xy)}={0,|x|,y}且x,y∈R,求x,y的值.
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解下列不等式:
(1)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225150215055544/SYS201311012251502150555016_ST/0.png)
;(2)log
73x<log
7(x
2-4).
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化简下列各式:
(1)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225150215055544/SYS201311012251502150555015_ST/0.png)
;
(2)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225150215055544/SYS201311012251502150555015_ST/1.png)
.
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