25.已知函数f(x)={1x+1,x<04x−1,x>0f(x)=\left\{\begin{array}{l}{\frac{1}{x}+1,x<0}\\ {\frac{4}{x}-1,x>0}\end{array}\right.f(x)={x1+1,x<0x4−1,x>0,若f(x1)=f(x2)f(x_{1})=f(x_{2})f(x1)=f(x2),则∣x1−x2∣\vert x_{1}-x_{2}\vert∣x1−x2∣的最小值为((( )))