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函数y=2x-1的反函数是A.y=log2(x-1)(x>1)B.y=1+log2x(x>...
试题详情
函数y=2
x-1的反函数是( )
A.y=log
2(x-1)(x>1)
B.y=1+log
2x(x>0)
C.
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)
D.
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已知函数
是定义在(-1,1)上的奇函数,且
,
①求函数f(x)的解析式;
②判断函数f(x)在(-1,1)上的单调性并用定义证明;
③解关于x的不等式f(log2x-1)+f(log2x)<0.
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)
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)
C.f(x)=-log2x(x>0)
D.f(x)=-log2(-x)(x<0)