- #1
seto6
- 251
- 0
Homework Statement
let an= [tex]\sum^{k=1}_{n}[/tex] 1/[tex]\sqrt{k}[/tex]
what is the radius of convergence of [tex]\Sigma[/tex][tex]\suma^{n=1}_{infinity} a_{n}x^n[/tex]
i tired including the an term into the x^n equation then i got stuck.. help please
2. Suppose that [tex]\alpha[/tex] and [tex]\beta[/tex] are positive real numbers with [tex]\alpha[/tex] < [tex]\beta[/tex]. find a power series with an interval of convergence that is of the given interval:
I. ([tex]\alpha[/tex],[tex]\beta[/tex])
II. [[tex]\alpha[/tex],[tex]\beta[/tex])
i basically came up with power series that i know that has this convergence, but is there a systematic way of doing it, with a real proof.
Thank you in advance
Last edited: