25. 已知函数f(x)f(x)f(x)关于直线x=0x=0x=0对称,且当x1<x2⩽0x_{1}<x_{2}\leqslant 0x1<x2⩽0时,[f(x2)−f(x1)](x2−x1)>0[f(x_{2})-f(x_{1})](x_{2}-x_{1})>0[f(x2)−f(x1)](x2−x1)>0恒成立,则满足f(3x−1)>f(13)f({3x-1})>f({\frac{1}{3}})f(3x−1)>f(31)的xxx的取值范围是((( )))