1、f(5/2)+f(7/2)=0,f(3/2)+f(5/2)=0,f(1/2)+f(3/2)=0,f(-1/2)+f(1/2)=0
,f(-1/2)=f(1/2)得出f(7/2)=02、f(7/3)+f(4/3)=0,f(4/3)+f(1/3)=0,f(1/3)+f(-2/3)=0,f(-2/3)=f(2/3), 得出(7/3)=-f(2/3).3、f(2/5)+f(7/5)=0,f(-3/5)+f(2/5)=0,f(-3/5)=f(3/5),得出f(7/5)=f(3/5)4、由于在【0,1】单调递减,所以f(3/5)0
故选C
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