what is the radius of convergence of the power series Σan xⁿ

suppose Σan xⁿ be a power series and an= the number of divisors of n⁵⁰.

Then what will be the radius of convergence of this power series?

Thanks in advance . regards.(Bow)

Quote:

---

Originally Posted by sorv1986

suppose Σan xⁿ be a power series and an= the number of divisors of n⁵⁰. Then what will be the radius of convergence of this power series?

---

Hint . Now, apply the Sandwich Theorem.