1 Let ak = 1 + k2 (a) Show that M ax converges. k=1 100 (b) If we approximate E ak by E ak, bound the resulting error above. k=1 k=1 (c) Show that _(-1)kak converges. k=1 100 (d) If we approximate E(-1)hak by [(-1)"ak, bound the absolute value of the resulting error k=1 k=1 above