Then one of the following things can happen:
a) Wonverges for all .
! œ b) Wonverges only for
c) There is a positive number V , so that
V - B V - V -W converges for all
W diverges for all B-V
depending on the series)
The interval -VB-V
Þ the number V is W
What happens at the two endpoints (Bœ-V
and must be checked out separately.
Find the interval of convergence of each of the following power series :