For each sequence a, find a number k such that n'an has a finite non-zero limit. (This is of use, because by the limit comparison test the series > an and >n-k both converge or both Σ Σ n=1 n=1 diverge.) А. ат — (4+ 2n)-2 k = 2 В. а, — nº +n k = 2n2+2n+2 С. ап 6n°+6n+2 k =

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.