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Let 7n 4n + 7 For the following answer blanks, decide whether the given sequence or series is convergent or divergent. If convergent, enter the limit (for a sequence) or the sum (for a series). If divergent, enter 'infinity' if it diverges to co, '-infinity' if it diverges to -co or 'DNE' otherwise. (a) The series 4n + 7 n=1 7n (b) The sequence 4n + 7