Yet another convergence problem

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SUMMARY

The discussion focuses on the convergence of the series defined by the sum from n=1 to infinity of (n!)/(2^(n^2)). The ratio test is identified as the appropriate method for determining convergence due to the presence of the factorial. Participants emphasize the importance of correctly applying the ratio test, particularly in simplifying the expression (n+1)(2^(n^2)) / (2^(n+1)^2) and suggest expanding 2^(n+1)^2 to facilitate further analysis.

PREREQUISITES
  • Understanding of series convergence tests, specifically the ratio test.
  • Familiarity with factorial notation and operations.
  • Knowledge of exponent rules and simplification techniques.
  • Basic calculus concepts related to infinite series.
NEXT STEPS
  • Study the application of the ratio test in detail, including examples with factorials.
  • Learn about convergence criteria for series involving exponential functions.
  • Explore advanced techniques for simplifying expressions with exponents.
  • Review the properties of factorial growth compared to exponential decay.
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Students and educators in calculus, mathematicians analyzing series convergence, and anyone seeking to deepen their understanding of infinite series and convergence tests.

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Homework Statement


It's the sum (n=1 to infinity) of (n!)/(2^(n^2)) I hope that's not too hard to read?


Homework Equations


The ratio test, I think? Since it contains a factorial.


The Attempt at a Solution


It seems like I'm never short of calculus questions. Everytime I try to apply the ratio test, I end up getting to (n+1)(2^(n^2)) / (2^(n+1)^2) and I'm unsure of where to go from there to see if it converges or not.
 
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Try expanding 2^(n+1)^2 and then rewrite that using some rules of exponents.
 

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