题目内容
函数f(x)=2x+3(x∈R)的反函数f-1(x)=( )
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试题答案
B
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函数f(x)=2x+3(x∈R)的反函数f-1(x)=( )
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| A.log2x-3,(x>0) | B.log2(x-3),(x>3) |
| C.log2(x+3),(x>-3) | D.2x-3,(x∈R) |
函数f(x)=2x+3(x∈R)的反函数f-1(x)=( )
A.log2x-3,(x>0)
B.log2(x-3),(x>3)
C.log2(x+3),(x>-3)
D.2x-3,(x∈R)
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A.log2x-3,(x>0)
B.log2(x-3),(x>3)
C.log2(x+3),(x>-3)
D.2x-3,(x∈R)
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