已知函数f(x)>0,且满足f(x·y)=f(x)·f(y),若x>1,则f(x)>1
2个回答
1.
设01
f(x2)>f(x1)
2.
f(x^2)=f(x)^2=f(-x)^2
f(x)>0
f(x)=f(-x)
3.
f(x-2)
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