6. Determine whether the following alternating series areally,converging absolutely, condition-diverging.or (a) E1)"n=18. (b)(-1)"n2n=1 (c) Σ(-1)"(n+ c)Vn5 +3where c > 1 is a constantn=1 (a) (-1)" (n³ + 2)d) Σ2ηn=1 (-1)"nn2
+ c(e)where 0 < c <1 is a constantn=1 (-1)"3"(f)n!n=1