Finding Radius and Convergence of Power Series | Simple Problem | Ratio Test

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SUMMARY

The discussion focuses on determining the radius and interval of convergence for the power series \(\sum^{\infty}_{n=0}\frac{100^{n}(x+7)^{n}}{n!}\) using the Ratio Test. The participants clarify that a radius of convergence can indeed be zero, but in this case, the limiting ratio suggests an infinite radius of convergence. The conclusion emphasizes that if the limit approaches zero, the series converges for all \(x\), indicating an infinite radius.

PREREQUISITES
  • Understanding of power series and their convergence properties
  • Familiarity with the Ratio Test for convergence
  • Basic knowledge of limits in calculus
  • Experience with factorial notation in series
NEXT STEPS
  • Study the application of the Ratio Test in various power series
  • Explore the concept of radius and interval of convergence in more depth
  • Learn about other convergence tests, such as the Root Test
  • Investigate the implications of convergence on function behavior
USEFUL FOR

Students studying calculus, particularly those focusing on series and sequences, as well as educators teaching convergence tests in mathematical analysis.

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Homework Statement


Find the radius and interval of convergence of the given power series.

[tex]\sum[/tex][tex]^{\infty}_{n=0}[/tex][tex]\stackrel{100^{n}(x+7)^{n}}{n!}[/tex]



Homework Equations


Ratio Test



The Attempt at a Solution


My real question is: Can the radius be 0? Cuz that's what I get. Would the radius just be x?
 
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The radius of convergence of a power series could be zero. But I don't think that one is. If you got 0 for the limiting ratio, that would actually imply an infinite radius of convergence.
 

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