Definition:Geometric Sequence/Initial Term

Definition
Let $G = \left\langle{a_1, a_2, \ldots}\right\rangle$ be a geometric progression.

The initial term of $G_n$ is the term $a_1$.

The same definition applies to a finite geometric progression $G_n = \left\langle{a_1, a_2, \ldots, a_n}\right\rangle$.