Corollary 4.3. If , then for all n, .
Proof.
Proof of Corollary 4.3 is mentioned in the book.
Complex Analysis for Mathematics and Engineering
![[Graphics:Images/ComplexGeometricSeriesMod_gr_128.gif]](../Images/ComplexGeometricSeriesMod_gr_128.gif){kind=small}
, then
for all n, ![[Graphics:Images/ComplexGeometricSeriesMod_gr_129.gif]](../Images/ComplexGeometricSeriesMod_gr_129.gif){kind=small}
. , then
for all n, .