当x属于[-1,1]时,f(x)=x^3
f(0)=0,f(-1)=-1,f(1)=1
f(2)=f(1+1)=f(1-1)=f(0)=0
f(3)=f(1+2)=f(1-2)=f(-1)=-1
f(4)=f(1+3)=f(1-3)=f(-2)=-f(2)=0
f(5)=f(1+4)=f(1-4)=f(-3)=-f(3)=1
...
f(2007)=f(2008-1)=f(-1)=-1
当x属于[-1,1]时,f(x)=x^3
f(0)=0,f(-1)=-1,f(1)=1
f(2)=f(1+1)=f(1-1)=f(0)=0
f(3)=f(1+2)=f(1-2)=f(-1)=-1
f(4)=f(1+3)=f(1-3)=f(-2)=-f(2)=0
f(5)=f(1+4)=f(1-4)=f(-3)=-f(3)=1
...
f(2007)=f(2008-1)=f(-1)=-1