Tutorial Exercise Find the radius of convergence and interval of convergence of the series. (-13)x E Vn Part 1 of 9 We will use the Ratio Test to determine the radius of convergence. We have (-13)0 +1in+1 an + 1 Vn+ 1 lim = lim n - an n- - (-13)" x lim (-13)x n n n - n + 1 n+1 Part 2 of 9 We know that lim n n-an+1 Therefore, lim n n- = Vn+1