The sequence is .
The first term is .
The nth term and the st term of the sequence
are
and
The ratio(r) =
(Substitute r =
and
)
(Substitute r =
and
)
(Substitute r =
and
)
The ratio of successive terms is the nonzero constant 2,
\The sequence is geometric with common ratio
.
The sequence is geometric with common ratio
.
first four terms are