$\"\"$

The sequence is $\"\"$ .

The first term is $\"\"$ .

The nth term and the $\"\"$ th term of the sequence $\"\"$ are

$\"\"$ and $\"\"$

The ratio(r) = $\"\"$ $\"\"$

$\"\"$ (Substitute r = 9 and $\"\"$ )

The ratio of successive terms is the nonzero constant 9,

The sequence $\"\"$ is geometric with common ratio 9. $\"\"$

The sequence $\"\"$ is geometric with common ratio 9.

First four terms are 9 , 81 , 729 , 6561.