8．已知函数f(x)={2−(12)x,x⩽0∣log2x∣,x>0f(x)=\left\{\begin{array}{l}2-{(\frac{1}{2})^x},x\leqslant 0\\ \vert {\log _2}x\vert ,x>0\end{array}\right.f(x)={2−(21)x,x⩽0∣log2x∣,x>0，方程f2(x)+2f(x)−m=0(m>0)f^{2}(x)+2f(x)-m=0(m>0)f2(x)+2f(x)−m=0(m>0)有四个不同的实数根，从小到大依次是x1x_{1}x1，x2x_{2}x2，x3x_{3}x3，x4x_{4}x4，则下列说法正确的有((( )))