题目
题型:难度:来源:
【题文】若f(10x)= x, 则f(5) = .
答案
【答案】lg5
解析
【解析】由题意10x= 5,故x= lg5,即 f(5)= lg5
核心考点
举一反三
【题文】已知函数,则( )
A.8 | B.9 | C.11 | D.10 |
【题文】已知函数,则( )
A.8 | B.9 | C.11 | D.10 |
【题文】若f(x)=,则下列等式成立的是( )。
A.f( | B.f()=-f(x) |
C.f()= | D. |
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