11. Series k=1 For each of the following sequences {a}, decide wether the series Σak is convergent or not. You must specify what test you use, and why this test applies. (a) ak = 2, (b) a = ²+2 3k 2k +1 (c) ak = (d) ak = (e) ak = (f) ak = (g) ak = (h) ak = (i) ak = k2 (k+1)³ sin k k² (-1) In(k+2) 3k+2. cos (km)k! 10k (3k)!(k+1)! (4k)!

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