Showing that nth root of c_n is equal to nth root of c_n+1 in the limit

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The discussion centers on proving that the limit superior of the nth root of the sequence \( c_{n+1} \) is equal to the limit superior of the nth root of the sequence \( c_n \). The user attempts to manipulate the expression using properties of limits and exponential decay but encounters difficulties. The key conclusion is that if \( c_n = 1 \) for all \( n \), both limits simplify to 1, confirming the equality. The discussion highlights the importance of understanding limit superior in the context of sequences.

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OhMyMarkov
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Hello everyone!

I'm trying to show that $\lim \sup \sqrt[n]{c_{n+1}}=\lim \sup \sqrt[n]{c_n}$

This is my attempt:
$\lim \sup \sqrt[n]{c_{n+1}} = \lim \sup \sqrt[m-1]{c_m}=\lim \sup c_m \; ^{\frac{1}{m}}c_m \; ^{\frac{1}{m(m-1)}}$

I'm stuck here, I think I must use some exponential property that says that something decays faster than something or the ratio of two things is zero in the limit...

Any help is appreciated!
 
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OhMyMarkov said:
I'm trying to show that $\lim \sup \sqrt[n]{c_{n+1}}=\lim \sup \sqrt[n]{c_n}{n}$
What if $c_n=1$ for all $n$?
 
Ah excuse me LaTeX typo: I meant

I'm trying to show that: $\lim \sup \sqrt[n]{c_{n+1}} = \lim \sup \sqrt[n]{c_{n}}$

I fixed it in the thread
 

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