已知函数f(x)的定义域为R,且对于一切实数x满足f（x+2)=f(2-x),f(x+7)=f(7-x),若f(5)=9,则f（-5）=求大神
人气：480 ℃ 时间：2019-11-24 06:25:28
解答
f（x+2)=f(2-x),f(x+7)=f(7-x),图像关于x=2、x=7对称,周期为10,所以f(-5)=f(5)=9 不懂可以再问!
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