896483.fig.001
Figure 1: The blue curve is the graph of the equation 𝜑 1 ( 𝑥 , 𝑦 ) = 0 with the vertical asymptotic line 𝑥 = ( 5 1 ) / 2 and the green curve is the graph of 𝜑 2 ( 𝑥 , 𝑦 ) = 0 with the vertical asymptotic line 𝑥 = 1 .