解方程：R*R/1.793=ln(R/0.075)

解方程：R*R/1.793=ln(R/0.075)
解方程：R*R/1.793=ln(R/0.075)

解方程：R*R/1.793=ln(R/0.075)
有两个根
3/40*exp(-1/2*lambertw(-45/7172)) =0.07523715453175
3/40*exp(-1/2*lambertw(-1,-45/7172)) =2.50867941462248
lambertw是朗伯W函数
W = lambertw(X)表示为we^w=x