2x+1/3=1/(2/x-3) 两边乘以2/x-3
得(2x+1/3)(2/x-3)
=4+2/（6x）-6x-1=1
6x-2/（6x)=2
两边乘以6x 得(6x)^2-12x-2=(6x-1)^2-3=0
6x-1=正负√3 x1=(√3+1)/6 x2=(1-√3)/6