11.已知f(x)f(x)f(x)是定义域为{x∣x≠0}\{x\vert x\ne 0\}{x∣x=0}的偶函数且f(x)=∣lnxx∣−1e2(x>0)f(x)=\vert {\frac{lnx}{x}}\vert -\frac{1}{e^2}(x>0)f(x)=∣xlnx∣−e21(x>0),则函数f(x)f(x)f(x)零点个数是((( )))