2009 National Question 11 Single-choice Differentiating 2009_quanguo_old_i 11.(5分)函数f(x)的定义域为R,若f(x+1)与f(x﹣1)都是奇函数,则( ) A. f(x)是偶函数B. f(x)是奇函数C. f(x)=f(x+2)D. f(x+3)是奇函数 Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →