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 Recognitions: Gold Member Homework Help You have the right idea, but it isn't written well. You need to use your observations to write your argument in reverse. Something like this: Given can $\rightarrow$ L we will show that an $\rightarrow$ L/|c|, which is a contradiction. Suppose$\ \epsilon > 0$. Then there is N > 0 such that: | can - L| < |c|$\epsilon$ for all n > N. Therefore |can - L| = |c(an - L/c| = |c||(an - L/c| < |c|$\epsilon$ which gives, upon dividing that last inequality by |c|, | an - L/c| < $\epsilon$ for all n > N.