Revision as of 17:34, 26 September 2008 by Sje (Talk)

$ f(x) = 0 ---> -2 \leqq x \leqq -1 $


$ f(x) = x ---> -1 \leqq x \leqq 1 $


$ f(x) = 0 ---> 1 \leqq x \leqq 2 $


$ f(x+4)=f(x) $

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