How Do You Determine the Radius and Interval of Convergence for a Power Series?

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SUMMARY

The discussion focuses on determining the radius and interval of convergence for the power series Ʃ k=0->∞ (1/k+1) (x)^k. The user correctly identifies that the series converges for |x| < 1 and diverges for |x| > 1, establishing the radius of convergence (R) as 1. However, the user seeks clarification on how to express the interval of convergence, which is essential for fully understanding the behavior of the series at the endpoints.

PREREQUISITES
  • Understanding of power series and their convergence properties
  • Familiarity with the Ratio Test for convergence
  • Basic knowledge of limits and absolute values
  • Concept of interval notation for expressing ranges
NEXT STEPS
  • Study the Ratio Test for determining convergence of series
  • Learn about endpoint behavior in power series convergence
  • Explore examples of power series with different radii of convergence
  • Review interval notation and how to express intervals of convergence
USEFUL FOR

Students in calculus courses, particularly those studying series and convergence, as well as educators looking for clear explanations of power series behavior.

camel-man
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I need help finishing this problem I am stuck.

find radius of conv. and interval of convergence of the series. Ʃ k=0->∞ (1/k+1) (x)^k

I have found all the way up to row=1 there for it is between (0,∞) so now that means that if absolute value of x<1 it converges if >1 it diverges but I forgot how I find what x is. I thought it was R which would be 1. Someone please explain to me as elementary as possible because I am no math major this is my last course/test and I will never use this again.
 
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camel-man said:
I need help finishing this problem I am stuck.

find radius of conv. and interval of convergence of the series. Ʃ k=0->∞ (1/k+1) (x)^k

I have found all the way up to row=1 there for it is between (0,∞) so now that means that if absolute value of x<1 it converges if >1 it diverges but I forgot how I find what x is. I thought it was R which would be 1. Someone please explain to me as elementary as possible because I am no math major this is my last course/test and I will never use this again.

We don't do test questions here.
 

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