91Ó°ÊÓ

In the following exercises, find the indicated term of the given sequence. Find the general term for the sequence.

Find $a_{12}$of the sequence,$5,15,45,135,405,1215,...$

In the following exercises, find the indicated term of the given sequence. Find the general term for the sequence.

Find$a_{15}$of the sequence, $-486,162,-54,18,-6,2,...$

In the following exercises, find the indicated term of the given sequence. Find the general term for the sequence.

Find $a_{16}$of the sequence,$224,-112,56,-28,14,-7,...$

In the following exercises, find the indicated term of the given sequence. Find the general term for the sequence.

Find $a_{10}$of the sequence,$1,0.1,0.01,0.001,0.0001,0.00001,...$

In the following exercises, find the indicated term of the given sequence. Find the general term for the sequence.

Find$a_9$of the sequence,$1000,100,10,1,0.1,0.01,...$

In the following exercises, find the sum of the first fifteen terms of each geometric sequence.

$8,24,72,216,648,1944,...$

In the following exercises, find the sum of the first fifteen terms of each geometric sequence.

$7,14,28,56,112,224,...$

In the following exercises, find the sum of the first fifteen terms of each geometric sequence.

$-6,12,-24,48,-96,192,...$

In the following exercise, write the first five terms of the sequence whose general term is given.

$a_n={\left(−1\right)}^{n+1}â‹\dots n^4$

In the following exercises, find the sum of the first fifteen terms of each geometric sequence.

$-4,12,-36,108,-324,972,...$