函数f(x)的定义域为D,若对于任意x1,x2∈D,当x1<x2时都有f(x1)≤f(x2),则称函数f(x)在D上为非减函数,设f(x)在[0,1]上为非减函数,且满足以下条件:(1)f(0)=0,(2)f(x3)=12f(x)(3)f(1-x)=1-f(x),则f(13)+f(18)=3434.
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