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题目6

Rf(x):f(x)+f(x)=0,f(2x)=f(x),f(x)
[1,1]()

解析


f(x)x=1
{f(x)=f(x)f(2x)=f(x),f(2x)=f(x)
f(2+x)=f(x)
f(x+4)=f(x+2)=f(x)4
f(8)=f(0)
f(5.5)=f(1.5)=f(20.5)=f(0.5)
f(3)=f(1)
f(0)<f(0.5)<f(1)