8. Given the power series Σ(−1)n_(5x) find and justify its interval of 9 4n In(n) n=2 convergence and the behavior of the series at the end points of the interval. Σr- + ²+1 sin x- - (-1) (2n + 1)! ** cos x = (-1)* 2)! T 2! tan 'x- (-1) ²-----4 -x- 2n + 1 In(1+x) -2 (-1²-²¹-x-+-+ 11