(a) Show the following limit of a sequence: lim n?? (n + ln(n)) / n = 1. (b) Use the limit comparison test to show that ? n=1 ? (n + ln(n)) / n^3 converges. Hint: ((n + ln(n)) / n^3) / (1 / n^2) = (n + ln(n)) / n^3 * n^2 = (n + ln(n)) / n
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We can rewrite the sequence as $\frac{n}{n}+\frac{\ln(n)}{n} = 1+\frac{\ln(n)}{n}$. Now, as $n$ approaches infinity, the term $\frac{\ln(n)}{n}$ approaches 0, since the natural logarithm function grows slower than the linear function. Show more…
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