Deternime with justification whether the following series converge or not 00 1 (a) ΣIn [5] 2n +1 (b) Σ 21 00 π! 2n I1 [5] (-1)*+1 (c) Σ [5] η3 11 00 4.2 Let (an)nen, be a sequence of nonnegative numbers so that the series or converges. Does the series van converges? [5] η