I need help comparing and contrasting the ratio test and the existence of power series solutions theorem , specifically for computing the radius of convergence of a power series solution centered about an ordinary point.

Compare and contrast using the ratio test and the Existence of Power Series Solutions theorem for computing the radius of convergence of a power series solution centered about an ordinary point. Which one do you like more? Why? Be sure to give a thoughtful reply to another student's post Compare and contrast using the ratio test and the Existence of Power Series Solutions theorem for computing the radius of convergence of a power series solution centered about an ordinary point. Which one do you like more? Why? Be sure to give a thoughtful reply to another student's post