MHB 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 focuses on demonstrating that the limit superior of the nth root of the sequence \( c_{n+1} \) equals that of \( c_n \). The user attempts to manipulate the limits using properties of exponents but encounters difficulties, particularly in applying the correct exponential decay properties. They express confusion about how to show that the ratio of two sequences approaches zero in the limit. Clarifications are made regarding a typo in the original statement, emphasizing the goal of proving the equality of the two limit superiors. Assistance is sought to resolve these mathematical challenges effectively.
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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
 
We all know the definition of n-dimensional topological manifold uses open sets and homeomorphisms onto the image as open set in ##\mathbb R^n##. It should be possible to reformulate the definition of n-dimensional topological manifold using closed sets on the manifold's topology and on ##\mathbb R^n## ? I'm positive for this. Perhaps the definition of smooth manifold would be problematic, though.

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