Question about algebraic rule for limsup

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SUMMARY

The discussion centers on the algebraic rule for the limit superior (limsup) of sequences, specifically questioning whether the equation limsup (√(a_{n+1})/√(a_{n})) equals √(limsup (a_{n+1}/a_{n})) holds true. It is established that this relationship is valid under the condition that the terms a_n remain non-negative and real. The participants agree that the rule applies similarly to normal limits and extends to limsup, reinforcing its applicability in real analysis.

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diligence
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Hi,

Is it true that [itex]limsup \frac{\sqrt{a_{n+1}}}{\sqrt{a_{n}}} = \sqrt{limsup \frac{a_{n+1}}{a_{n}}}[/itex] ?

I think this is true for normal limits but does it extend to limsup?
 
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As long as the a's don't go negative, and stay real, you're OK.
 

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